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Finding the Fourth Proportional to 72,790.64, 100,449.88 and 40,959.52

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Solution

The fourth proportional to 72,790.64, 100,449.88 and 40,959.52 is: 56,523.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,790.64 : 100,449.88 = 40,959.52 : x
  2. Step 2: Convert to fraction form
    72,790.64/100,449.88 = 40,959.52/x
  3. Step 3: Cross multiply
    72,790.64x = 100,449.88 × 40,959.52
  4. Step 4: Simplify right side
    72,790.64x = 4,114,378,868.86
  5. Step 5: Solve for x
    x = 4,114,378,868.86/72,790.64
  6. Step 6: Final answer
    x = 56,523.46

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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.