Home / 81,660.12-121,994.07-51,839.16

Finding the Fourth Proportional to 81,660.12, 121,994.07 and 51,839.16

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Solution

The fourth proportional to 81,660.12, 121,994.07 and 51,839.16 is: 77,443.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,660.12 : 121,994.07 = 51,839.16 : x
  2. Step 2: Convert to fraction form
    81,660.12/121,994.07 = 51,839.16/x
  3. Step 3: Cross multiply
    81,660.12x = 121,994.07 × 51,839.16
  4. Step 4: Simplify right side
    81,660.12x = 6,324,070,113.78
  5. Step 5: Solve for x
    x = 6,324,070,113.78/81,660.12
  6. Step 6: Final answer
    x = 77,443.80

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1.5x scale

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.