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Finding the Fourth Proportional to 91,611.10, 138,040.72 and 75,335.71

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Solution

The fourth proportional to 91,611.10, 138,040.72 and 75,335.71 is: 113,516.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,611.10 : 138,040.72 = 75,335.71 : x
  2. Step 2: Convert to fraction form
    91,611.10/138,040.72 = 75,335.71/x
  3. Step 3: Cross multiply
    91,611.10x = 138,040.72 × 75,335.71
  4. Step 4: Simplify right side
    91,611.10x = 10,399,395,650.11
  5. Step 5: Solve for x
    x = 10,399,395,650.11/91,611.10
  6. Step 6: Final answer
    x = 113,516.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.