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Finding the Fourth Proportional to 272,382.02, 408,638.64 and 85,393.52

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Solution

The fourth proportional to 272,382.02, 408,638.64 and 85,393.52 is: 128,110.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,382.02 : 408,638.64 = 85,393.52 : x
  2. Step 2: Convert to fraction form
    272,382.02/408,638.64 = 85,393.52/x
  3. Step 3: Cross multiply
    272,382.02x = 408,638.64 × 85,393.52
  4. Step 4: Simplify right side
    272,382.02x = 34,895,091,877.61
  5. Step 5: Solve for x
    x = 34,895,091,877.61/272,382.02
  6. Step 6: Final answer
    x = 128,110.85

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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.