Home / 81,376.10-121,454.06-76,061.69

Finding the Fourth Proportional to 81,376.10, 121,454.06 and 76,061.69

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Solution

The fourth proportional to 81,376.10, 121,454.06 and 76,061.69 is: 113,522.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,376.10 : 121,454.06 = 76,061.69 : x
  2. Step 2: Convert to fraction form
    81,376.10/121,454.06 = 76,061.69/x
  3. Step 3: Cross multiply
    81,376.10x = 121,454.06 × 76,061.69
  4. Step 4: Simplify right side
    81,376.10x = 9,238,000,680.65
  5. Step 5: Solve for x
    x = 9,238,000,680.65/81,376.10
  6. Step 6: Final answer
    x = 113,522.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.