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Finding the Fourth Proportional to 138,841.36, 191,601.20 and 75,179.20

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Solution

The fourth proportional to 138,841.36, 191,601.20 and 75,179.20 is: 103,747.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,841.36 : 191,601.20 = 75,179.20 : x
  2. Step 2: Convert to fraction form
    138,841.36/191,601.20 = 75,179.20/x
  3. Step 3: Cross multiply
    138,841.36x = 191,601.20 × 75,179.20
  4. Step 4: Simplify right side
    138,841.36x = 14,404,424,935.04
  5. Step 5: Solve for x
    x = 14,404,424,935.04/138,841.36
  6. Step 6: Final answer
    x = 103,747.36

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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.