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Finding the Fourth Proportional to 112,689.75, 155,516.72 and 62,388.75

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Solution

The fourth proportional to 112,689.75, 155,516.72 and 62,388.75 is: 86,099.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,689.75 : 155,516.72 = 62,388.75 : x
  2. Step 2: Convert to fraction form
    112,689.75/155,516.72 = 62,388.75/x
  3. Step 3: Cross multiply
    112,689.75x = 155,516.72 × 62,388.75
  4. Step 4: Simplify right side
    112,689.75x = 9,702,493,452.96
  5. Step 5: Solve for x
    x = 9,702,493,452.96/112,689.75
  6. Step 6: Final answer
    x = 86,099.17

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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.