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Finding the Fourth Proportional to 72,722.55, 100,356.13 and 40,891.52

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Solution

The fourth proportional to 72,722.55, 100,356.13 and 40,891.52 is: 56,429.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,722.55 : 100,356.13 = 40,891.52 : x
  2. Step 2: Convert to fraction form
    72,722.55/100,356.13 = 40,891.52/x
  3. Step 3: Cross multiply
    72,722.55x = 100,356.13 × 40,891.52
  4. Step 4: Simplify right side
    72,722.55x = 4,103,714,697.02
  5. Step 5: Solve for x
    x = 4,103,714,697.02/72,722.55
  6. Step 6: Final answer
    x = 56,429.74

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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.