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Finding the Fourth Proportional to 99,860, 137,806.80 and 55,150.88

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Solution

The fourth proportional to 99,860, 137,806.80 and 55,150.88 is: 76,108.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,860 : 137,806.80 = 55,150.88 : x
  2. Step 2: Convert to fraction form
    99,860/137,806.80 = 55,150.88/x
  3. Step 3: Cross multiply
    99,860x = 137,806.80 × 55,150.88
  4. Step 4: Simplify right side
    99,860x = 7,600,166,289.98
  5. Step 5: Solve for x
    x = 7,600,166,289.98/99,860
  6. Step 6: Final answer
    x = 76,108.21

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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.