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Finding the Fourth Proportional to 87,324, 120,526.56 and 55,486.68

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Solution

The fourth proportional to 87,324, 120,526.56 and 55,486.68 is: 76,583.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,324 : 120,526.56 = 55,486.68 : x
  2. Step 2: Convert to fraction form
    87,324/120,526.56 = 55,486.68/x
  3. Step 3: Cross multiply
    87,324x = 120,526.56 × 55,486.68
  4. Step 4: Simplify right side
    87,324x = 6,687,618,666.22
  5. Step 5: Solve for x
    x = 6,687,618,666.22/87,324
  6. Step 6: Final answer
    x = 76,583.97

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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.