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Finding the Fourth Proportional to 79,296.75, 109,428.75 and 43,486.65

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Solution

The fourth proportional to 79,296.75, 109,428.75 and 43,486.65 is: 60,011.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,296.75 : 109,428.75 = 43,486.65 : x
  2. Step 2: Convert to fraction form
    79,296.75/109,428.75 = 43,486.65/x
  3. Step 3: Cross multiply
    79,296.75x = 109,428.75 × 43,486.65
  4. Step 4: Simplify right side
    79,296.75x = 4,758,689,751.19
  5. Step 5: Solve for x
    x = 4,758,689,751.19/79,296.75
  6. Step 6: Final answer
    x = 60,011.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.