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Finding the Fourth Proportional to 85,280.40, 127,805.40 and 75,373.20

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Solution

The fourth proportional to 85,280.40, 127,805.40 and 75,373.20 is: 112,957.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,280.40 : 127,805.40 = 75,373.20 : x
  2. Step 2: Convert to fraction form
    85,280.40/127,805.40 = 75,373.20/x
  3. Step 3: Cross multiply
    85,280.40x = 127,805.40 × 75,373.20
  4. Step 4: Simplify right side
    85,280.40x = 9,633,101,975.28
  5. Step 5: Solve for x
    x = 9,633,101,975.28/85,280.40
  6. Step 6: Final answer
    x = 112,957.98

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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.