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Finding the Fourth Proportional to 72,951.32, 100,672.78 and 39,417.32

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Solution

The fourth proportional to 72,951.32, 100,672.78 and 39,417.32 is: 54,395.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,951.32 : 100,672.78 = 39,417.32 : x
  2. Step 2: Convert to fraction form
    72,951.32/100,672.78 = 39,417.32/x
  3. Step 3: Cross multiply
    72,951.32x = 100,672.78 × 39,417.32
  4. Step 4: Simplify right side
    72,951.32x = 3,968,251,184.55
  5. Step 5: Solve for x
    x = 3,968,251,184.55/72,951.32
  6. Step 6: Final answer
    x = 54,395.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.