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Finding the Fourth Proportional to 138,662.70, 191,353.82 and 75,000.36

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Solution

The fourth proportional to 138,662.70, 191,353.82 and 75,000.36 is: 103,500.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,662.70 : 191,353.82 = 75,000.36 : x
  2. Step 2: Convert to fraction form
    138,662.70/191,353.82 = 75,000.36/x
  3. Step 3: Cross multiply
    138,662.70x = 191,353.82 × 75,000.36
  4. Step 4: Simplify right side
    138,662.70x = 14,351,605,387.38
  5. Step 5: Solve for x
    x = 14,351,605,387.38/138,662.70
  6. Step 6: Final answer
    x = 103,500.11

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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.