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Finding the Fourth Proportional to 272,054.80, 408,082.20 and 85,123.60

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Solution

The fourth proportional to 272,054.80, 408,082.20 and 85,123.60 is: 127,685.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,054.80 : 408,082.20 = 85,123.60 : x
  2. Step 2: Convert to fraction form
    272,054.80/408,082.20 = 85,123.60/x
  3. Step 3: Cross multiply
    272,054.80x = 408,082.20 × 85,123.60
  4. Step 4: Simplify right side
    272,054.80x = 34,737,425,959.92
  5. Step 5: Solve for x
    x = 34,737,425,959.92/272,054.80
  6. Step 6: Final answer
    x = 127,685.40

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1.5x scale

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.