Home / 74,639.70-111,959.55-45,115.20

Finding the Fourth Proportional to 74,639.70, 111,959.55 and 45,115.20

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Solution

The fourth proportional to 74,639.70, 111,959.55 and 45,115.20 is: 67,672.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,639.70 : 111,959.55 = 45,115.20 : x
  2. Step 2: Convert to fraction form
    74,639.70/111,959.55 = 45,115.20/x
  3. Step 3: Cross multiply
    74,639.70x = 111,959.55 × 45,115.20
  4. Step 4: Simplify right side
    74,639.70x = 5,051,077,490.16
  5. Step 5: Solve for x
    x = 5,051,077,490.16/74,639.70
  6. Step 6: Final answer
    x = 67,672.80

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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.