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Finding the Fourth Proportional to 124,663.95, 171,886.17 and 86,456.61

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Solution

The fourth proportional to 124,663.95, 171,886.17 and 86,456.61 is: 119,206.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,663.95 : 171,886.17 = 86,456.61 : x
  2. Step 2: Convert to fraction form
    124,663.95/171,886.17 = 86,456.61/x
  3. Step 3: Cross multiply
    124,663.95x = 171,886.17 × 86,456.61
  4. Step 4: Simplify right side
    124,663.95x = 14,860,695,564.08
  5. Step 5: Solve for x
    x = 14,860,695,564.08/124,663.95
  6. Step 6: Final answer
    x = 119,206.04

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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.