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Finding the Fourth Proportional to 99,681.66, 137,560.23 and 54,969.66

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Solution

The fourth proportional to 99,681.66, 137,560.23 and 54,969.66 is: 75,857.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,681.66 : 137,560.23 = 54,969.66 : x
  2. Step 2: Convert to fraction form
    99,681.66/137,560.23 = 54,969.66/x
  3. Step 3: Cross multiply
    99,681.66x = 137,560.23 × 54,969.66
  4. Step 4: Simplify right side
    99,681.66x = 7,561,639,072.62
  5. Step 5: Solve for x
    x = 7,561,639,072.62/99,681.66
  6. Step 6: Final answer
    x = 75,857.88

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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.