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Finding the Fourth Proportional to 156,711.72, 216,262.17 and 89,643.72

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Solution

The fourth proportional to 156,711.72, 216,262.17 and 89,643.72 is: 123,708.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,711.72 : 216,262.17 = 89,643.72 : x
  2. Step 2: Convert to fraction form
    156,711.72/216,262.17 = 89,643.72/x
  3. Step 3: Cross multiply
    156,711.72x = 216,262.17 × 89,643.72
  4. Step 4: Simplify right side
    156,711.72x = 19,386,545,414.07
  5. Step 5: Solve for x
    x = 19,386,545,414.07/156,711.72
  6. Step 6: Final answer
    x = 123,708.33

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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.