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Finding the Fourth Proportional to 89,491.71, 123,486.67 and 55,487.79

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Solution

The fourth proportional to 89,491.71, 123,486.67 and 55,487.79 is: 76,565.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,491.71 : 123,486.67 = 55,487.79 : x
  2. Step 2: Convert to fraction form
    89,491.71/123,486.67 = 55,487.79/x
  3. Step 3: Cross multiply
    89,491.71x = 123,486.67 × 55,487.79
  4. Step 4: Simplify right side
    89,491.71x = 6,852,002,482.12
  5. Step 5: Solve for x
    x = 6,852,002,482.12/89,491.71
  6. Step 6: Final answer
    x = 76,565.78

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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.