Home / 112,708.20-155,537.64-61,721.40

Finding the Fourth Proportional to 112,708.20, 155,537.64 and 61,721.40

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Solution

The fourth proportional to 112,708.20, 155,537.64 and 61,721.40 is: 85,175.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,708.20 : 155,537.64 = 61,721.40 : x
  2. Step 2: Convert to fraction form
    112,708.20/155,537.64 = 61,721.40/x
  3. Step 3: Cross multiply
    112,708.20x = 155,537.64 × 61,721.40
  4. Step 4: Simplify right side
    112,708.20x = 9,600,000,893.50
  5. Step 5: Solve for x
    x = 9,600,000,893.50/112,708.20
  6. Step 6: Final answer
    x = 85,175.71

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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.