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Finding the Fourth Proportional to 158,537.80, 218,781.30 and 86,920.84

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Solution

The fourth proportional to 158,537.80, 218,781.30 and 86,920.84 is: 119,950.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,537.80 : 218,781.30 = 86,920.84 : x
  2. Step 2: Convert to fraction form
    158,537.80/218,781.30 = 86,920.84/x
  3. Step 3: Cross multiply
    158,537.80x = 218,781.30 × 86,920.84
  4. Step 4: Simplify right side
    158,537.80x = 19,016,654,372.29
  5. Step 5: Solve for x
    x = 19,016,654,372.29/158,537.80
  6. Step 6: Final answer
    x = 119,950.29

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1.5x scale

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.