Home / 87,766.16-121,116.80-47,479.79

Finding the Fourth Proportional to 87,766.16, 121,116.80 and 47,479.79

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Solution

The fourth proportional to 87,766.16, 121,116.80 and 47,479.79 is: 65,521.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,766.16 : 121,116.80 = 47,479.79 : x
  2. Step 2: Convert to fraction form
    87,766.16/121,116.80 = 47,479.79/x
  3. Step 3: Cross multiply
    87,766.16x = 121,116.80 × 47,479.79
  4. Step 4: Simplify right side
    87,766.16x = 5,750,600,650.96
  5. Step 5: Solve for x
    x = 5,750,600,650.96/87,766.16
  6. Step 6: Final answer
    x = 65,521.85

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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.