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Finding the Fourth Proportional to 72,494.88, 100,041.28 and 40,663.04

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Solution

The fourth proportional to 72,494.88, 100,041.28 and 40,663.04 is: 56,114.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,494.88 : 100,041.28 = 40,663.04 : x
  2. Step 2: Convert to fraction form
    72,494.88/100,041.28 = 40,663.04/x
  3. Step 3: Cross multiply
    72,494.88x = 100,041.28 × 40,663.04
  4. Step 4: Simplify right side
    72,494.88x = 4,067,982,570.29
  5. Step 5: Solve for x
    x = 4,067,982,570.29/72,494.88
  6. Step 6: Final answer
    x = 56,114.07

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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.