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Finding the Fourth Proportional to 158,984, 219,397.92 and 91,920.32

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Solution

The fourth proportional to 158,984, 219,397.92 and 91,920.32 is: 126,850.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,984 : 219,397.92 = 91,920.32 : x
  2. Step 2: Convert to fraction form
    158,984/219,397.92 = 91,920.32/x
  3. Step 3: Cross multiply
    158,984x = 219,397.92 × 91,920.32
  4. Step 4: Simplify right side
    158,984x = 20,167,127,013.73
  5. Step 5: Solve for x
    x = 20,167,127,013.73/158,984
  6. Step 6: Final answer
    x = 126,850.04

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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.