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Finding the Fourth Proportional to 80,711.80, 121,087.16 and 25,307.80

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Solution

The fourth proportional to 80,711.80, 121,087.16 and 25,307.80 is: 37,967.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,711.80 : 121,087.16 = 25,307.80 : x
  2. Step 2: Convert to fraction form
    80,711.80/121,087.16 = 25,307.80/x
  3. Step 3: Cross multiply
    80,711.80x = 121,087.16 × 25,307.80
  4. Step 4: Simplify right side
    80,711.80x = 3,064,449,627.85
  5. Step 5: Solve for x
    x = 3,064,449,627.85/80,711.80
  6. Step 6: Final answer
    x = 37,967.80

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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.