Home / 283,445.78-391,155.14-156,121.37

Finding the Fourth Proportional to 283,445.78, 391,155.14 and 156,121.37

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Solution

The fourth proportional to 283,445.78, 391,155.14 and 156,121.37 is: 215,447.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,445.78 : 391,155.14 = 156,121.37 : x
  2. Step 2: Convert to fraction form
    283,445.78/391,155.14 = 156,121.37/x
  3. Step 3: Cross multiply
    283,445.78x = 391,155.14 × 156,121.37
  4. Step 4: Simplify right side
    283,445.78x = 61,067,678,440.95
  5. Step 5: Solve for x
    x = 61,067,678,440.95/283,445.78
  6. Step 6: Final answer
    x = 215,447.48

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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.