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Finding the Fourth Proportional to 40,750.80, 61,131.91 and 38,509.80

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Solution

The fourth proportional to 40,750.80, 61,131.91 and 38,509.80 is: 57,770.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,750.80 : 61,131.91 = 38,509.80 : x
  2. Step 2: Convert to fraction form
    40,750.80/61,131.91 = 38,509.80/x
  3. Step 3: Cross multiply
    40,750.80x = 61,131.91 × 38,509.80
  4. Step 4: Simplify right side
    40,750.80x = 2,354,177,998.51
  5. Step 5: Solve for x
    x = 2,354,177,998.51/40,750.80
  6. Step 6: Final answer
    x = 57,770.10

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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.