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Finding the Fourth Proportional to 138,434.10, 207,359.54 and 138,434.10

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Solution

The fourth proportional to 138,434.10, 207,359.54 and 138,434.10 is: 207,359.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,434.10 : 207,359.54 = 138,434.10 : x
  2. Step 2: Convert to fraction form
    138,434.10/207,359.54 = 138,434.10/x
  3. Step 3: Cross multiply
    138,434.10x = 207,359.54 × 138,434.10
  4. Step 4: Simplify right side
    138,434.10x = 28,705,631,296.31
  5. Step 5: Solve for x
    x = 28,705,631,296.31/138,434.10
  6. Step 6: Final answer
    x = 207,359.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.