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Finding the Fourth Proportional to 72,291.64, 99,760.86 and 40,024.39

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Solution

The fourth proportional to 72,291.64, 99,760.86 and 40,024.39 is: 55,232.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,291.64 : 99,760.86 = 40,024.39 : x
  2. Step 2: Convert to fraction form
    72,291.64/99,760.86 = 40,024.39/x
  3. Step 3: Cross multiply
    72,291.64x = 99,760.86 × 40,024.39
  4. Step 4: Simplify right side
    72,291.64x = 3,992,867,567.38
  5. Step 5: Solve for x
    x = 3,992,867,567.38/72,291.64
  6. Step 6: Final answer
    x = 55,232.77

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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.