Home / 65,398.71-90,253.19-38,542.35

Finding the Fourth Proportional to 65,398.71, 90,253.19 and 38,542.35

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Solution

The fourth proportional to 65,398.71, 90,253.19 and 38,542.35 is: 53,190.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,398.71 : 90,253.19 = 38,542.35 : x
  2. Step 2: Convert to fraction form
    65,398.71/90,253.19 = 38,542.35/x
  3. Step 3: Cross multiply
    65,398.71x = 90,253.19 × 38,542.35
  4. Step 4: Simplify right side
    65,398.71x = 3,478,570,037.60
  5. Step 5: Solve for x
    x = 3,478,570,037.60/65,398.71
  6. Step 6: Final answer
    x = 53,190.19

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Half scale
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Double scale
Find fourth proportional to 65,399.71, 90,254.57 and 38,543.35
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.