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Finding the Fourth Proportional to 89,624.40, 123,792.48 and 65,713.20

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Solution

The fourth proportional to 89,624.40, 123,792.48 and 65,713.20 is: 90,765.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,624.40 : 123,792.48 = 65,713.20 : x
  2. Step 2: Convert to fraction form
    89,624.40/123,792.48 = 65,713.20/x
  3. Step 3: Cross multiply
    89,624.40x = 123,792.48 × 65,713.20
  4. Step 4: Simplify right side
    89,624.40x = 8,134,799,996.74
  5. Step 5: Solve for x
    x = 8,134,799,996.74/89,624.40
  6. Step 6: Final answer
    x = 90,765.46

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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.