Home / 86,505.77-129,779.62-42,122.43

Finding the Fourth Proportional to 86,505.77, 129,779.62 and 42,122.43

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Solution

The fourth proportional to 86,505.77, 129,779.62 and 42,122.43 is: 63,193.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,505.77 : 129,779.62 = 42,122.43 : x
  2. Step 2: Convert to fraction form
    86,505.77/129,779.62 = 42,122.43/x
  3. Step 3: Cross multiply
    86,505.77x = 129,779.62 × 42,122.43
  4. Step 4: Simplify right side
    86,505.77x = 5,466,632,853.57
  5. Step 5: Solve for x
    x = 5,466,632,853.57/86,505.77
  6. Step 6: Final answer
    x = 63,193.85

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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.