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Finding the Fourth Proportional to 82,443.60, 123,519.60 and 69,904.80

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Solution

The fourth proportional to 82,443.60, 123,519.60 and 69,904.80 is: 104,733.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,443.60 : 123,519.60 = 69,904.80 : x
  2. Step 2: Convert to fraction form
    82,443.60/123,519.60 = 69,904.80/x
  3. Step 3: Cross multiply
    82,443.60x = 123,519.60 × 69,904.80
  4. Step 4: Simplify right side
    82,443.60x = 8,634,612,934.08
  5. Step 5: Solve for x
    x = 8,634,612,934.08/82,443.60
  6. Step 6: Final answer
    x = 104,733.57

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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.