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Finding the Fourth Proportional to 138,489.60, 207,705.60 and 59,606.40

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Solution

The fourth proportional to 138,489.60, 207,705.60 and 59,606.40 is: 89,397.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,489.60 : 207,705.60 = 59,606.40 : x
  2. Step 2: Convert to fraction form
    138,489.60/207,705.60 = 59,606.40/x
  3. Step 3: Cross multiply
    138,489.60x = 207,705.60 × 59,606.40
  4. Step 4: Simplify right side
    138,489.60x = 12,380,583,075.84
  5. Step 5: Solve for x
    x = 12,380,583,075.84/138,489.60
  6. Step 6: Final answer
    x = 89,397.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.