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Finding the Fourth Proportional to 90,610.79, 135,916.27 and 34,437.69

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Solution

The fourth proportional to 90,610.79, 135,916.27 and 34,437.69 is: 51,656.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,610.79 : 135,916.27 = 34,437.69 : x
  2. Step 2: Convert to fraction form
    90,610.79/135,916.27 = 34,437.69/x
  3. Step 3: Cross multiply
    90,610.79x = 135,916.27 × 34,437.69
  4. Step 4: Simplify right side
    90,610.79x = 4,680,642,286.12
  5. Step 5: Solve for x
    x = 4,680,642,286.12/90,610.79
  6. Step 6: Final answer
    x = 51,656.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.