Home / 99,931.12-137,908.65-54,612.15

Finding the Fourth Proportional to 99,931.12, 137,908.65 and 54,612.15

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Solution

The fourth proportional to 99,931.12, 137,908.65 and 54,612.15 is: 75,366.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,931.12 : 137,908.65 = 54,612.15 : x
  2. Step 2: Convert to fraction form
    99,931.12/137,908.65 = 54,612.15/x
  3. Step 3: Cross multiply
    99,931.12x = 137,908.65 × 54,612.15
  4. Step 4: Simplify right side
    99,931.12x = 7,531,487,802.01
  5. Step 5: Solve for x
    x = 7,531,487,802.01/99,931.12
  6. Step 6: Final answer
    x = 75,366.79

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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.