Home / 78,148.20-107,844.62-42,338.21

Finding the Fourth Proportional to 78,148.20, 107,844.62 and 42,338.21

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Solution

The fourth proportional to 78,148.20, 107,844.62 and 42,338.21 is: 58,426.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,148.20 : 107,844.62 = 42,338.21 : x
  2. Step 2: Convert to fraction form
    78,148.20/107,844.62 = 42,338.21/x
  3. Step 3: Cross multiply
    78,148.20x = 107,844.62 × 42,338.21
  4. Step 4: Simplify right side
    78,148.20x = 4,565,947,629.71
  5. Step 5: Solve for x
    x = 4,565,947,629.71/78,148.20
  6. Step 6: Final answer
    x = 58,426.78

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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.