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Finding the Fourth Proportional to 72,431.76, 99,957.84 and 40,599.84

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Solution

The fourth proportional to 72,431.76, 99,957.84 and 40,599.84 is: 56,028.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,431.76 : 99,957.84 = 40,599.84 : x
  2. Step 2: Convert to fraction form
    72,431.76/99,957.84 = 40,599.84/x
  3. Step 3: Cross multiply
    72,431.76x = 99,957.84 × 40,599.84
  4. Step 4: Simplify right side
    72,431.76x = 4,058,272,310.75
  5. Step 5: Solve for x
    x = 4,058,272,310.75/72,431.76
  6. Step 6: Final answer
    x = 56,028.91

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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.