Home / 138,406.20-207,263.70-91,404.60

Finding the Fourth Proportional to 138,406.20, 207,263.70 and 91,404.60

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Solution

The fourth proportional to 138,406.20, 207,263.70 and 91,404.60 is: 136,878.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,406.20 : 207,263.70 = 91,404.60 : x
  2. Step 2: Convert to fraction form
    138,406.20/207,263.70 = 91,404.60/x
  3. Step 3: Cross multiply
    138,406.20x = 207,263.70 × 91,404.60
  4. Step 4: Simplify right side
    138,406.20x = 18,944,855,593.02
  5. Step 5: Solve for x
    x = 18,944,855,593.02/138,406.20
  6. Step 6: Final answer
    x = 136,878.66

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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.