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Finding the Fourth Proportional to 112,743, 155,590.20 and 62,442

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Solution

The fourth proportional to 112,743, 155,590.20 and 62,442 is: 86,172.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,743 : 155,590.20 = 62,442 : x
  2. Step 2: Convert to fraction form
    112,743/155,590.20 = 62,442/x
  3. Step 3: Cross multiply
    112,743x = 155,590.20 × 62,442
  4. Step 4: Simplify right side
    112,743x = 9,715,363,268.40
  5. Step 5: Solve for x
    x = 9,715,363,268.40/112,743
  6. Step 6: Final answer
    x = 86,172.65

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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.