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Finding the Fourth Proportional to 65,412.50, 90,281.03 and 38,553.44

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Solution

The fourth proportional to 65,412.50, 90,281.03 and 38,553.44 is: 53,210.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,412.50 : 90,281.03 = 38,553.44 : x
  2. Step 2: Convert to fraction form
    65,412.50/90,281.03 = 38,553.44/x
  3. Step 3: Cross multiply
    65,412.50x = 90,281.03 × 38,553.44
  4. Step 4: Simplify right side
    65,412.50x = 3,480,643,629.07
  5. Step 5: Solve for x
    x = 3,480,643,629.07/65,412.50
  6. Step 6: Final answer
    x = 53,210.68

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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.