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Finding the Fourth Proportional to 78,658.65, 108,589.17 and 53,299.04

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Solution

The fourth proportional to 78,658.65, 108,589.17 and 53,299.04 is: 73,579.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,658.65 : 108,589.17 = 53,299.04 : x
  2. Step 2: Convert to fraction form
    78,658.65/108,589.17 = 53,299.04/x
  3. Step 3: Cross multiply
    78,658.65x = 108,589.17 × 53,299.04
  4. Step 4: Simplify right side
    78,658.65x = 5,787,698,172.32
  5. Step 5: Solve for x
    x = 5,787,698,172.32/78,658.65
  6. Step 6: Final answer
    x = 73,579.93

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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.