Home / 81,134.18-121,405.23-47,870.18

Finding the Fourth Proportional to 81,134.18, 121,405.23 and 47,870.18

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Solution

The fourth proportional to 81,134.18, 121,405.23 and 47,870.18 is: 71,630.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,134.18 : 121,405.23 = 47,870.18 : x
  2. Step 2: Convert to fraction form
    81,134.18/121,405.23 = 47,870.18/x
  3. Step 3: Cross multiply
    81,134.18x = 121,405.23 × 47,870.18
  4. Step 4: Simplify right side
    81,134.18x = 5,811,690,213.04
  5. Step 5: Solve for x
    x = 5,811,690,213.04/81,134.18
  6. Step 6: Final answer
    x = 71,630.60

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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.