Home / 87,012.83-120,135.51-66,833.60

Finding the Fourth Proportional to 87,012.83, 120,135.51 and 66,833.60

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Solution

The fourth proportional to 87,012.83, 120,135.51 and 66,833.60 is: 92,274.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,012.83 : 120,135.51 = 66,833.60 : x
  2. Step 2: Convert to fraction form
    87,012.83/120,135.51 = 66,833.60/x
  3. Step 3: Cross multiply
    87,012.83x = 120,135.51 × 66,833.60
  4. Step 4: Simplify right side
    87,012.83x = 8,029,088,020.46
  5. Step 5: Solve for x
    x = 8,029,088,020.46/87,012.83
  6. Step 6: Final answer
    x = 92,274.77

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1.5x scale

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.