Home / 80,914.40-121,501.20-61,215.20

Finding the Fourth Proportional to 80,914.40, 121,501.20 and 61,215.20

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Solution

The fourth proportional to 80,914.40, 121,501.20 and 61,215.20 is: 91,920.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,914.40 : 121,501.20 = 61,215.20 : x
  2. Step 2: Convert to fraction form
    80,914.40/121,501.20 = 61,215.20/x
  3. Step 3: Cross multiply
    80,914.40x = 121,501.20 × 61,215.20
  4. Step 4: Simplify right side
    80,914.40x = 7,437,720,258.24
  5. Step 5: Solve for x
    x = 7,437,720,258.24/80,914.40
  6. Step 6: Final answer
    x = 91,920.85

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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.