Home / 112,689.30-155,513.07-61,701.20

Finding the Fourth Proportional to 112,689.30, 155,513.07 and 61,701.20

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Solution

The fourth proportional to 112,689.30, 155,513.07 and 61,701.20 is: 85,148.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,689.30 : 155,513.07 = 61,701.20 : x
  2. Step 2: Convert to fraction form
    112,689.30/155,513.07 = 61,701.20/x
  3. Step 3: Cross multiply
    112,689.30x = 155,513.07 × 61,701.20
  4. Step 4: Simplify right side
    112,689.30x = 9,595,342,257.12
  5. Step 5: Solve for x
    x = 9,595,342,257.12/112,689.30
  6. Step 6: Final answer
    x = 85,148.65

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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.