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Finding the Fourth Proportional to 65,489.74, 90,360.06 and 38,250.40

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Solution

The fourth proportional to 65,489.74, 90,360.06 and 38,250.40 is: 52,776.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,489.74 : 90,360.06 = 38,250.40 : x
  2. Step 2: Convert to fraction form
    65,489.74/90,360.06 = 38,250.40/x
  3. Step 3: Cross multiply
    65,489.74x = 90,360.06 × 38,250.40
  4. Step 4: Simplify right side
    65,489.74x = 3,456,308,439.02
  5. Step 5: Solve for x
    x = 3,456,308,439.02/65,489.74
  6. Step 6: Final answer
    x = 52,776.33

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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.