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Finding the Fourth Proportional to 138,388.56, 191,007.30 and 90,614.16

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Solution

The fourth proportional to 138,388.56, 191,007.30 and 90,614.16 is: 125,067.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,388.56 : 191,007.30 = 90,614.16 : x
  2. Step 2: Convert to fraction form
    138,388.56/191,007.30 = 90,614.16/x
  3. Step 3: Cross multiply
    138,388.56x = 191,007.30 × 90,614.16
  4. Step 4: Simplify right side
    138,388.56x = 17,307,966,043.37
  5. Step 5: Solve for x
    x = 17,307,966,043.37/138,388.56
  6. Step 6: Final answer
    x = 125,067.90

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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.