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Finding the Fourth Proportional to 272,473.28, 408,709.52 and 85,499.36

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Solution

The fourth proportional to 272,473.28, 408,709.52 and 85,499.36 is: 128,248.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,473.28 : 408,709.52 = 85,499.36 : x
  2. Step 2: Convert to fraction form
    272,473.28/408,709.52 = 85,499.36/x
  3. Step 3: Cross multiply
    272,473.28x = 408,709.52 × 85,499.36
  4. Step 4: Simplify right side
    272,473.28x = 34,944,402,385.91
  5. Step 5: Solve for x
    x = 34,944,402,385.91/272,473.28
  6. Step 6: Final answer
    x = 128,248.91

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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.