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Finding the Fourth Proportional to 112,676.78, 155,489.55 and 62,374.70

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Solution

The fourth proportional to 112,676.78, 155,489.55 and 62,374.70 is: 86,074.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,676.78 : 155,489.55 = 62,374.70 : x
  2. Step 2: Convert to fraction form
    112,676.78/155,489.55 = 62,374.70/x
  3. Step 3: Cross multiply
    112,676.78x = 155,489.55 × 62,374.70
  4. Step 4: Simplify right side
    112,676.78x = 9,698,614,034.39
  5. Step 5: Solve for x
    x = 9,698,614,034.39/112,676.78
  6. Step 6: Final answer
    x = 86,074.65

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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.