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Finding the Fourth Proportional to 72,689.17, 100,269.21 and 45,417.95

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Solution

The fourth proportional to 72,689.17, 100,269.21 and 45,417.95 is: 62,650.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,689.17 : 100,269.21 = 45,417.95 : x
  2. Step 2: Convert to fraction form
    72,689.17/100,269.21 = 45,417.95/x
  3. Step 3: Cross multiply
    72,689.17x = 100,269.21 × 45,417.95
  4. Step 4: Simplify right side
    72,689.17x = 4,554,022,447.58
  5. Step 5: Solve for x
    x = 4,554,022,447.58/72,689.17
  6. Step 6: Final answer
    x = 62,650.63

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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.