Home / 138,404.20-207,260.70-91,402.60

Finding the Fourth Proportional to 138,404.20, 207,260.70 and 91,402.60

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Solution

The fourth proportional to 138,404.20, 207,260.70 and 91,402.60 is: 136,875.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,404.20 : 207,260.70 = 91,402.60 : x
  2. Step 2: Convert to fraction form
    138,404.20/207,260.70 = 91,402.60/x
  3. Step 3: Cross multiply
    138,404.20x = 207,260.70 × 91,402.60
  4. Step 4: Simplify right side
    138,404.20x = 18,944,166,857.82
  5. Step 5: Solve for x
    x = 18,944,166,857.82/138,404.20
  6. Step 6: Final answer
    x = 136,875.66

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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.