Home / 80,729.66-121,015.96-38,598.80

Finding the Fourth Proportional to 80,729.66, 121,015.96 and 38,598.80

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Solution

The fourth proportional to 80,729.66, 121,015.96 and 38,598.80 is: 57,860.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,729.66 : 121,015.96 = 38,598.80 : x
  2. Step 2: Convert to fraction form
    80,729.66/121,015.96 = 38,598.80/x
  3. Step 3: Cross multiply
    80,729.66x = 121,015.96 × 38,598.80
  4. Step 4: Simplify right side
    80,729.66x = 4,671,070,135.27
  5. Step 5: Solve for x
    x = 4,671,070,135.27/80,729.66
  6. Step 6: Final answer
    x = 57,860.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.