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Finding the Fourth Proportional to 71,951.88, 99,296.67 and 40,120.79

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Solution

The fourth proportional to 71,951.88, 99,296.67 and 40,120.79 is: 55,368.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,951.88 : 99,296.67 = 40,120.79 : x
  2. Step 2: Convert to fraction form
    71,951.88/99,296.67 = 40,120.79/x
  3. Step 3: Cross multiply
    71,951.88x = 99,296.67 × 40,120.79
  4. Step 4: Simplify right side
    71,951.88x = 3,983,860,348.29
  5. Step 5: Solve for x
    x = 3,983,860,348.29/71,951.88
  6. Step 6: Final answer
    x = 55,368.40

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1.5x scale

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.