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Finding the Fourth Proportional to 99,507.80, 137,215.53 and 76,850.48

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Solution

The fourth proportional to 99,507.80, 137,215.53 and 76,850.48 is: 105,972.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,507.80 : 137,215.53 = 76,850.48 : x
  2. Step 2: Convert to fraction form
    99,507.80/137,215.53 = 76,850.48/x
  3. Step 3: Cross multiply
    99,507.80x = 137,215.53 × 76,850.48
  4. Step 4: Simplify right side
    99,507.80x = 10,545,079,343.95
  5. Step 5: Solve for x
    x = 10,545,079,343.95/99,507.80
  6. Step 6: Final answer
    x = 105,972.39

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1.5x scale

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.