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Finding the Fourth Proportional to 158,348.54, 218,513.19 and 86,728.88

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Solution

The fourth proportional to 158,348.54, 218,513.19 and 86,728.88 is: 119,681.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,348.54 : 218,513.19 = 86,728.88 : x
  2. Step 2: Convert to fraction form
    158,348.54/218,513.19 = 86,728.88/x
  3. Step 3: Cross multiply
    158,348.54x = 218,513.19 × 86,728.88
  4. Step 4: Simplify right side
    158,348.54x = 18,951,404,233.93
  5. Step 5: Solve for x
    x = 18,951,404,233.93/158,348.54
  6. Step 6: Final answer
    x = 119,681.58

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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.