Home / 81,129.18-121,635.45-36,733.08

Finding the Fourth Proportional to 81,129.18, 121,635.45 and 36,733.08

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Solution

The fourth proportional to 81,129.18, 121,635.45 and 36,733.08 is: 55,073.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,129.18 : 121,635.45 = 36,733.08 : x
  2. Step 2: Convert to fraction form
    81,129.18/121,635.45 = 36,733.08/x
  3. Step 3: Cross multiply
    81,129.18x = 121,635.45 × 36,733.08
  4. Step 4: Simplify right side
    81,129.18x = 4,468,044,715.69
  5. Step 5: Solve for x
    x = 4,468,044,715.69/81,129.18
  6. Step 6: Final answer
    x = 55,073.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.