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Finding the Fourth Proportional to 72,253.97, 99,710.60 and 40,422.90

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Solution

The fourth proportional to 72,253.97, 99,710.60 and 40,422.90 is: 55,783.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,253.97 : 99,710.60 = 40,422.90 : x
  2. Step 2: Convert to fraction form
    72,253.97/99,710.60 = 40,422.90/x
  3. Step 3: Cross multiply
    72,253.97x = 99,710.60 × 40,422.90
  4. Step 4: Simplify right side
    72,253.97x = 4,030,591,223.67
  5. Step 5: Solve for x
    x = 4,030,591,223.67/72,253.97
  6. Step 6: Final answer
    x = 55,783.66

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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.