Home / 87,786.15-121,144.58-47,499.73

Finding the Fourth Proportional to 87,786.15, 121,144.58 and 47,499.73

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Solution

The fourth proportional to 87,786.15, 121,144.58 and 47,499.73 is: 65,549.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,786.15 : 121,144.58 = 47,499.73 : x
  2. Step 2: Convert to fraction form
    87,786.15/121,144.58 = 47,499.73/x
  3. Step 3: Cross multiply
    87,786.15x = 121,144.58 × 47,499.73
  4. Step 4: Simplify right side
    87,786.15x = 5,754,334,933.02
  5. Step 5: Solve for x
    x = 5,754,334,933.02/87,786.15
  6. Step 6: Final answer
    x = 65,549.46

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Double scale
Find fourth proportional to 87,787.15, 121,145.96 and 47,500.73
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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.