Home / 78,149.11-107,845.50-42,339.10

Finding the Fourth Proportional to 78,149.11, 107,845.50 and 42,339.10

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Solution

The fourth proportional to 78,149.11, 107,845.50 and 42,339.10 is: 58,427.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,149.11 : 107,845.50 = 42,339.10 : x
  2. Step 2: Convert to fraction form
    78,149.11/107,845.50 = 42,339.10/x
  3. Step 3: Cross multiply
    78,149.11x = 107,845.50 × 42,339.10
  4. Step 4: Simplify right side
    78,149.11x = 4,566,081,409.05
  5. Step 5: Solve for x
    x = 4,566,081,409.05/78,149.11
  6. Step 6: Final answer
    x = 58,427.81

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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.