Home / 80,681.52-121,012.56-28,086.60

Finding the Fourth Proportional to 80,681.52, 121,012.56 and 28,086.60

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Solution

The fourth proportional to 80,681.52, 121,012.56 and 28,086.60 is: 42,126.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,681.52 : 121,012.56 = 28,086.60 : x
  2. Step 2: Convert to fraction form
    80,681.52/121,012.56 = 28,086.60/x
  3. Step 3: Cross multiply
    80,681.52x = 121,012.56 × 28,086.60
  4. Step 4: Simplify right side
    80,681.52x = 3,398,831,367.70
  5. Step 5: Solve for x
    x = 3,398,831,367.70/80,681.52
  6. Step 6: Final answer
    x = 42,126.52

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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.