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Finding the Fourth Proportional to 125,170.20, 172,731.96 and 67,807.20

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Solution

The fourth proportional to 125,170.20, 172,731.96 and 67,807.20 is: 93,572.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,170.20 : 172,731.96 = 67,807.20 : x
  2. Step 2: Convert to fraction form
    125,170.20/172,731.96 = 67,807.20/x
  3. Step 3: Cross multiply
    125,170.20x = 172,731.96 × 67,807.20
  4. Step 4: Simplify right side
    125,170.20x = 11,712,470,558.11
  5. Step 5: Solve for x
    x = 11,712,470,558.11/125,170.20
  6. Step 6: Final answer
    x = 93,572.36

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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.