Home / 82,042.40-123,063.60-78,543.20

Finding the Fourth Proportional to 82,042.40, 123,063.60 and 78,543.20

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Solution

The fourth proportional to 82,042.40, 123,063.60 and 78,543.20 is: 117,814.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,042.40 : 123,063.60 = 78,543.20 : x
  2. Step 2: Convert to fraction form
    82,042.40/123,063.60 = 78,543.20/x
  3. Step 3: Cross multiply
    82,042.40x = 123,063.60 × 78,543.20
  4. Step 4: Simplify right side
    82,042.40x = 9,665,808,947.52
  5. Step 5: Solve for x
    x = 9,665,808,947.52/82,042.40
  6. Step 6: Final answer
    x = 117,814.80

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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.