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Finding the Fourth Proportional to 99,574.92, 137,442.38 and 65,124.56

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Solution

The fourth proportional to 99,574.92, 137,442.38 and 65,124.56 is: 89,890.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,574.92 : 137,442.38 = 65,124.56 : x
  2. Step 2: Convert to fraction form
    99,574.92/137,442.38 = 65,124.56/x
  3. Step 3: Cross multiply
    99,574.92x = 137,442.38 × 65,124.56
  4. Step 4: Simplify right side
    99,574.92x = 8,950,873,510.02
  5. Step 5: Solve for x
    x = 8,950,873,510.02/99,574.92
  6. Step 6: Final answer
    x = 89,890.84

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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.