Home / 85,395.20-127,929.60-45,939.20

Finding the Fourth Proportional to 85,395.20, 127,929.60 and 45,939.20

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Solution

The fourth proportional to 85,395.20, 127,929.60 and 45,939.20 is: 68,821.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,395.20 : 127,929.60 = 45,939.20 : x
  2. Step 2: Convert to fraction form
    85,395.20/127,929.60 = 45,939.20/x
  3. Step 3: Cross multiply
    85,395.20x = 127,929.60 × 45,939.20
  4. Step 4: Simplify right side
    85,395.20x = 5,876,983,480.32
  5. Step 5: Solve for x
    x = 5,876,983,480.32/85,395.20
  6. Step 6: Final answer
    x = 68,821.00

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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.