Home / 145,845.90-218,331.45-86,651.10

Finding the Fourth Proportional to 145,845.90, 218,331.45 and 86,651.10

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Solution

The fourth proportional to 145,845.90, 218,331.45 and 86,651.10 is: 129,716.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,845.90 : 218,331.45 = 86,651.10 : x
  2. Step 2: Convert to fraction form
    145,845.90/218,331.45 = 86,651.10/x
  3. Step 3: Cross multiply
    145,845.90x = 218,331.45 × 86,651.10
  4. Step 4: Simplify right side
    145,845.90x = 18,918,660,307.10
  5. Step 5: Solve for x
    x = 18,918,660,307.10/145,845.90
  6. Step 6: Final answer
    x = 129,716.78

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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.