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Finding the Fourth Proportional to 82,758.40, 124,188.90 and 43,343.80

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Solution

The fourth proportional to 82,758.40, 124,188.90 and 43,343.80 is: 65,042.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,758.40 : 124,188.90 = 43,343.80 : x
  2. Step 2: Convert to fraction form
    82,758.40/124,188.90 = 43,343.80/x
  3. Step 3: Cross multiply
    82,758.40x = 124,188.90 × 43,343.80
  4. Step 4: Simplify right side
    82,758.40x = 5,382,818,843.82
  5. Step 5: Solve for x
    x = 5,382,818,843.82/82,758.40
  6. Step 6: Final answer
    x = 65,042.57

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1.5x scale

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.