Home / 91,411.20-137,116.80-77,997.60

Finding the Fourth Proportional to 91,411.20, 137,116.80 and 77,997.60

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Solution

The fourth proportional to 91,411.20, 137,116.80 and 77,997.60 is: 116,996.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,411.20 : 137,116.80 = 77,997.60 : x
  2. Step 2: Convert to fraction form
    91,411.20/137,116.80 = 77,997.60/x
  3. Step 3: Cross multiply
    91,411.20x = 137,116.80 × 77,997.60
  4. Step 4: Simplify right side
    91,411.20x = 10,694,781,319.68
  5. Step 5: Solve for x
    x = 10,694,781,319.68/91,411.20
  6. Step 6: Final answer
    x = 116,996.40

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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.