Home / 138,655.12-207,987.89-38,812.75

Finding the Fourth Proportional to 138,655.12, 207,987.89 and 38,812.75

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Solution

The fourth proportional to 138,655.12, 207,987.89 and 38,812.75 is: 58,220.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,655.12 : 207,987.89 = 38,812.75 : x
  2. Step 2: Convert to fraction form
    138,655.12/207,987.89 = 38,812.75/x
  3. Step 3: Cross multiply
    138,655.12x = 207,987.89 × 38,812.75
  4. Step 4: Simplify right side
    138,655.12x = 8,072,581,977.60
  5. Step 5: Solve for x
    x = 8,072,581,977.60/138,655.12
  6. Step 6: Final answer
    x = 58,220.58

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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.