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Finding the Fourth Proportional to 272,061.80, 408,092.70 and 85,130.60

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Solution

The fourth proportional to 272,061.80, 408,092.70 and 85,130.60 is: 127,695.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,061.80 : 408,092.70 = 85,130.60 : x
  2. Step 2: Convert to fraction form
    272,061.80/408,092.70 = 85,130.60/x
  3. Step 3: Cross multiply
    272,061.80x = 408,092.70 × 85,130.60
  4. Step 4: Simplify right side
    272,061.80x = 34,741,176,406.62
  5. Step 5: Solve for x
    x = 34,741,176,406.62/272,061.80
  6. Step 6: Final answer
    x = 127,695.90

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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.