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Finding the Fourth Proportional to 122,379.58, 168,569.14 and 86,507.92

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Solution

The fourth proportional to 122,379.58, 168,569.14 and 86,507.92 is: 119,158.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,379.58 : 168,569.14 = 86,507.92 : x
  2. Step 2: Convert to fraction form
    122,379.58/168,569.14 = 86,507.92/x
  3. Step 3: Cross multiply
    122,379.58x = 168,569.14 × 86,507.92
  4. Step 4: Simplify right side
    122,379.58x = 14,582,565,677.59
  5. Step 5: Solve for x
    x = 14,582,565,677.59/122,379.58
  6. Step 6: Final answer
    x = 119,158.49

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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.