Home / 85,770.24-118,404-57,137.55

Finding the Fourth Proportional to 85,770.24, 118,404 and 57,137.55

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Solution

The fourth proportional to 85,770.24, 118,404 and 57,137.55 is: 78,877.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,770.24 : 118,404 = 57,137.55 : x
  2. Step 2: Convert to fraction form
    85,770.24/118,404 = 57,137.55/x
  3. Step 3: Cross multiply
    85,770.24x = 118,404 × 57,137.55
  4. Step 4: Simplify right side
    85,770.24x = 6,765,314,470.20
  5. Step 5: Solve for x
    x = 6,765,314,470.20/85,770.24
  6. Step 6: Final answer
    x = 78,877.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.