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Finding the Fourth Proportional to 93,221.62, 128,694.47 and 72,479.12

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Solution

The fourth proportional to 93,221.62, 128,694.47 and 72,479.12 is: 100,059.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,221.62 : 128,694.47 = 72,479.12 : x
  2. Step 2: Convert to fraction form
    93,221.62/128,694.47 = 72,479.12/x
  3. Step 3: Cross multiply
    93,221.62x = 128,694.47 × 72,479.12
  4. Step 4: Simplify right side
    93,221.62x = 9,327,661,517.27
  5. Step 5: Solve for x
    x = 9,327,661,517.27/93,221.62
  6. Step 6: Final answer
    x = 100,059.00

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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.