Home / 80,928.66-121,394.10-31,011.28

Finding the Fourth Proportional to 80,928.66, 121,394.10 and 31,011.28

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Solution

The fourth proportional to 80,928.66, 121,394.10 and 31,011.28 is: 46,517.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,928.66 : 121,394.10 = 31,011.28 : x
  2. Step 2: Convert to fraction form
    80,928.66/121,394.10 = 31,011.28/x
  3. Step 3: Cross multiply
    80,928.66x = 121,394.10 × 31,011.28
  4. Step 4: Simplify right side
    80,928.66x = 3,764,586,425.45
  5. Step 5: Solve for x
    x = 3,764,586,425.45/80,928.66
  6. Step 6: Final answer
    x = 46,517.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.