Home / 80,728.72-121,014.54-38,597.92

Finding the Fourth Proportional to 80,728.72, 121,014.54 and 38,597.92

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Solution

The fourth proportional to 80,728.72, 121,014.54 and 38,597.92 is: 57,859.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,728.72 : 121,014.54 = 38,597.92 : x
  2. Step 2: Convert to fraction form
    80,728.72/121,014.54 = 38,597.92/x
  3. Step 3: Cross multiply
    80,728.72x = 121,014.54 × 38,597.92
  4. Step 4: Simplify right side
    80,728.72x = 4,670,909,231.22
  5. Step 5: Solve for x
    x = 4,670,909,231.22/80,728.72
  6. Step 6: Final answer
    x = 57,859.33

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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.