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Finding the Fourth Proportional to 124,034.61, 185,904.29 and 86,390.88

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Solution

The fourth proportional to 124,034.61, 185,904.29 and 86,390.88 is: 129,483.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,034.61 : 185,904.29 = 86,390.88 : x
  2. Step 2: Convert to fraction form
    124,034.61/185,904.29 = 86,390.88/x
  3. Step 3: Cross multiply
    124,034.61x = 185,904.29 × 86,390.88
  4. Step 4: Simplify right side
    124,034.61x = 16,060,434,279.35
  5. Step 5: Solve for x
    x = 16,060,434,279.35/124,034.61
  6. Step 6: Final answer
    x = 129,483.49

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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.