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Finding the Fourth Proportional to 272,488.28, 408,801.56 and 85,501.40

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Solution

The fourth proportional to 272,488.28, 408,801.56 and 85,501.40 is: 128,273.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,488.28 : 408,801.56 = 85,501.40 : x
  2. Step 2: Convert to fraction form
    272,488.28/408,801.56 = 85,501.40/x
  3. Step 3: Cross multiply
    272,488.28x = 408,801.56 × 85,501.40
  4. Step 4: Simplify right side
    272,488.28x = 34,953,105,702.18
  5. Step 5: Solve for x
    x = 34,953,105,702.18/272,488.28
  6. Step 6: Final answer
    x = 128,273.79

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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.