Home / 51,128.80-76,605.60-40,631.20

Finding the Fourth Proportional to 51,128.80, 76,605.60 and 40,631.20

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Solution

The fourth proportional to 51,128.80, 76,605.60 and 40,631.20 is: 60,877.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,128.80 : 76,605.60 = 40,631.20 : x
  2. Step 2: Convert to fraction form
    51,128.80/76,605.60 = 40,631.20/x
  3. Step 3: Cross multiply
    51,128.80x = 76,605.60 × 40,631.20
  4. Step 4: Simplify right side
    51,128.80x = 3,112,577,454.72
  5. Step 5: Solve for x
    x = 3,112,577,454.72/51,128.80
  6. Step 6: Final answer
    x = 60,877.19

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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.