Home / 158,428.38-218,631.17-86,811.12

Finding the Fourth Proportional to 158,428.38, 218,631.17 and 86,811.12

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Solution

The fourth proportional to 158,428.38, 218,631.17 and 86,811.12 is: 119,799.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,428.38 : 218,631.17 = 86,811.12 : x
  2. Step 2: Convert to fraction form
    158,428.38/218,631.17 = 86,811.12/x
  3. Step 3: Cross multiply
    158,428.38x = 218,631.17 × 86,811.12
  4. Step 4: Simplify right side
    158,428.38x = 18,979,616,734.61
  5. Step 5: Solve for x
    x = 18,979,616,734.61/158,428.38
  6. Step 6: Final answer
    x = 119,799.35

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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.