Home / 80,177.12-120,307.15-58,172.12

Finding the Fourth Proportional to 80,177.12, 120,307.15 and 58,172.12

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Solution

The fourth proportional to 80,177.12, 120,307.15 and 58,172.12 is: 87,288.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,177.12 : 120,307.15 = 58,172.12 : x
  2. Step 2: Convert to fraction form
    80,177.12/120,307.15 = 58,172.12/x
  3. Step 3: Cross multiply
    80,177.12x = 120,307.15 × 58,172.12
  4. Step 4: Simplify right side
    80,177.12x = 6,998,521,966.66
  5. Step 5: Solve for x
    x = 6,998,521,966.66/80,177.12
  6. Step 6: Final answer
    x = 87,288.27

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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.