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Finding the Fourth Proportional to 99,762.61, 137,668.11 and 54,439.48

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Solution

The fourth proportional to 99,762.61, 137,668.11 and 54,439.48 is: 75,124.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,762.61 : 137,668.11 = 54,439.48 : x
  2. Step 2: Convert to fraction form
    99,762.61/137,668.11 = 54,439.48/x
  3. Step 3: Cross multiply
    99,762.61x = 137,668.11 × 54,439.48
  4. Step 4: Simplify right side
    99,762.61x = 7,494,580,320.98
  5. Step 5: Solve for x
    x = 7,494,580,320.98/99,762.61
  6. Step 6: Final answer
    x = 75,124.14

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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.