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Finding the Fourth Proportional to 40,751.80, 61,127.70 and 36,815.20

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Solution

The fourth proportional to 40,751.80, 61,127.70 and 36,815.20 is: 55,222.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,751.80 : 61,127.70 = 36,815.20 : x
  2. Step 2: Convert to fraction form
    40,751.80/61,127.70 = 36,815.20/x
  3. Step 3: Cross multiply
    40,751.80x = 61,127.70 × 36,815.20
  4. Step 4: Simplify right side
    40,751.80x = 2,250,428,501.04
  5. Step 5: Solve for x
    x = 2,250,428,501.04/40,751.80
  6. Step 6: Final answer
    x = 55,222.80

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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.