Home / 81,718.38-122,515.26-42,250.32

Finding the Fourth Proportional to 81,718.38, 122,515.26 and 42,250.32

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Solution

The fourth proportional to 81,718.38, 122,515.26 and 42,250.32 is: 63,343.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,718.38 : 122,515.26 = 42,250.32 : x
  2. Step 2: Convert to fraction form
    81,718.38/122,515.26 = 42,250.32/x
  3. Step 3: Cross multiply
    81,718.38x = 122,515.26 × 42,250.32
  4. Step 4: Simplify right side
    81,718.38x = 5,176,308,939.88
  5. Step 5: Solve for x
    x = 5,176,308,939.88/81,718.38
  6. Step 6: Final answer
    x = 63,343.26

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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.