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Finding the Fourth Proportional to 72,869.54, 100,557.30 and 40,602.49

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Solution

The fourth proportional to 72,869.54, 100,557.30 and 40,602.49 is: 56,029.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,869.54 : 100,557.30 = 40,602.49 : x
  2. Step 2: Convert to fraction form
    72,869.54/100,557.30 = 40,602.49/x
  3. Step 3: Cross multiply
    72,869.54x = 100,557.30 × 40,602.49
  4. Step 4: Simplify right side
    72,869.54x = 4,082,876,542.85
  5. Step 5: Solve for x
    x = 4,082,876,542.85/72,869.54
  6. Step 6: Final answer
    x = 56,029.95

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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.