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Finding the Fourth Proportional to 158,045.76, 218,103.85 and 86,425.68

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Solution

The fourth proportional to 158,045.76, 218,103.85 and 86,425.68 is: 119,267.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,045.76 : 218,103.85 = 86,425.68 : x
  2. Step 2: Convert to fraction form
    158,045.76/218,103.85 = 86,425.68/x
  3. Step 3: Cross multiply
    158,045.76x = 218,103.85 × 86,425.68
  4. Step 4: Simplify right side
    158,045.76x = 18,849,774,594.33
  5. Step 5: Solve for x
    x = 18,849,774,594.33/158,045.76
  6. Step 6: Final answer
    x = 119,267.83

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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.