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Finding the Fourth Proportional to 125,143, 172,670.46 and 74,171.68

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Solution

The fourth proportional to 125,143, 172,670.46 and 74,171.68 is: 102,340.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,143 : 172,670.46 = 74,171.68 : x
  2. Step 2: Convert to fraction form
    125,143/172,670.46 = 74,171.68/x
  3. Step 3: Cross multiply
    125,143x = 172,670.46 × 74,171.68
  4. Step 4: Simplify right side
    125,143x = 12,807,258,104.57
  5. Step 5: Solve for x
    x = 12,807,258,104.57/125,143
  6. Step 6: Final answer
    x = 102,340.99

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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.