Home / 80,897.78-121,401.30-28,307.72

Finding the Fourth Proportional to 80,897.78, 121,401.30 and 28,307.72

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Solution

The fourth proportional to 80,897.78, 121,401.30 and 28,307.72 is: 42,480.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,897.78 : 121,401.30 = 28,307.72 : x
  2. Step 2: Convert to fraction form
    80,897.78/121,401.30 = 28,307.72/x
  3. Step 3: Cross multiply
    80,897.78x = 121,401.30 × 28,307.72
  4. Step 4: Simplify right side
    80,897.78x = 3,436,594,008.04
  5. Step 5: Solve for x
    x = 3,436,594,008.04/80,897.78
  6. Step 6: Final answer
    x = 42,480.70

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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.