Home / 80,977.20-121,465.80-70,151.55

Finding the Fourth Proportional to 80,977.20, 121,465.80 and 70,151.55

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Solution

The fourth proportional to 80,977.20, 121,465.80 and 70,151.55 is: 105,227.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,977.20 : 121,465.80 = 70,151.55 : x
  2. Step 2: Convert to fraction form
    80,977.20/121,465.80 = 70,151.55/x
  3. Step 3: Cross multiply
    80,977.20x = 121,465.80 × 70,151.55
  4. Step 4: Simplify right side
    80,977.20x = 8,521,014,141.99
  5. Step 5: Solve for x
    x = 8,521,014,141.99/80,977.20
  6. Step 6: Final answer
    x = 105,227.33

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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.