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Finding the Fourth Proportional to 99,611.56, 137,459.95 and 54,288.57

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Solution

The fourth proportional to 99,611.56, 137,459.95 and 54,288.57 is: 74,916.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,611.56 : 137,459.95 = 54,288.57 : x
  2. Step 2: Convert to fraction form
    99,611.56/137,459.95 = 54,288.57/x
  3. Step 3: Cross multiply
    99,611.56x = 137,459.95 × 54,288.57
  4. Step 4: Simplify right side
    99,611.56x = 7,462,504,497.52
  5. Step 5: Solve for x
    x = 7,462,504,497.52/99,611.56
  6. Step 6: Final answer
    x = 74,916.05

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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.