Home / 78,947.12-108,948.30-47,134.64

Finding the Fourth Proportional to 78,947.12, 108,948.30 and 47,134.64

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Solution

The fourth proportional to 78,947.12, 108,948.30 and 47,134.64 is: 65,046.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,947.12 : 108,948.30 = 47,134.64 : x
  2. Step 2: Convert to fraction form
    78,947.12/108,948.30 = 47,134.64/x
  3. Step 3: Cross multiply
    78,947.12x = 108,948.30 × 47,134.64
  4. Step 4: Simplify right side
    78,947.12x = 5,135,238,899.11
  5. Step 5: Solve for x
    x = 5,135,238,899.11/78,947.12
  6. Step 6: Final answer
    x = 65,046.56

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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.