Home / 78,508.13-108,338.10-42,698.12

Finding the Fourth Proportional to 78,508.13, 108,338.10 and 42,698.12

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Solution

The fourth proportional to 78,508.13, 108,338.10 and 42,698.12 is: 58,921.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,508.13 : 108,338.10 = 42,698.12 : x
  2. Step 2: Convert to fraction form
    78,508.13/108,338.10 = 42,698.12/x
  3. Step 3: Cross multiply
    78,508.13x = 108,338.10 × 42,698.12
  4. Step 4: Simplify right side
    78,508.13x = 4,625,833,194.37
  5. Step 5: Solve for x
    x = 4,625,833,194.37/78,508.13
  6. Step 6: Final answer
    x = 58,921.71

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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.