Home / 78,109.68-107,791.19-42,299.58

Finding the Fourth Proportional to 78,109.68, 107,791.19 and 42,299.58

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Solution

The fourth proportional to 78,109.68, 107,791.19 and 42,299.58 is: 58,373.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,109.68 : 107,791.19 = 42,299.58 : x
  2. Step 2: Convert to fraction form
    78,109.68/107,791.19 = 42,299.58/x
  3. Step 3: Cross multiply
    78,109.68x = 107,791.19 × 42,299.58
  4. Step 4: Simplify right side
    78,109.68x = 4,559,521,853.20
  5. Step 5: Solve for x
    x = 4,559,521,853.20/78,109.68
  6. Step 6: Final answer
    x = 58,373.33

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1.5x scale

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.