Home / 80,937.20-121,405.80-45,945.20

Finding the Fourth Proportional to 80,937.20, 121,405.80 and 45,945.20

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Solution

The fourth proportional to 80,937.20, 121,405.80 and 45,945.20 is: 68,917.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,937.20 : 121,405.80 = 45,945.20 : x
  2. Step 2: Convert to fraction form
    80,937.20/121,405.80 = 45,945.20/x
  3. Step 3: Cross multiply
    80,937.20x = 121,405.80 × 45,945.20
  4. Step 4: Simplify right side
    80,937.20x = 5,578,013,762.16
  5. Step 5: Solve for x
    x = 5,578,013,762.16/80,937.20
  6. Step 6: Final answer
    x = 68,917.80

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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.