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Finding the Fourth Proportional to 72,818.77, 100,520.87 and 48,959.28

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Solution

The fourth proportional to 72,818.77, 100,520.87 and 48,959.28 is: 67,584.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,818.77 : 100,520.87 = 48,959.28 : x
  2. Step 2: Convert to fraction form
    72,818.77/100,520.87 = 48,959.28/x
  3. Step 3: Cross multiply
    72,818.77x = 100,520.87 × 48,959.28
  4. Step 4: Simplify right side
    72,818.77x = 4,921,429,420.17
  5. Step 5: Solve for x
    x = 4,921,429,420.17/72,818.77
  6. Step 6: Final answer
    x = 67,584.63

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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.