Home / 78,689.14-108,590.53-42,879.04

Finding the Fourth Proportional to 78,689.14, 108,590.53 and 42,879.04

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Solution

The fourth proportional to 78,689.14, 108,590.53 and 42,879.04 is: 59,172.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,689.14 : 108,590.53 = 42,879.04 : x
  2. Step 2: Convert to fraction form
    78,689.14/108,590.53 = 42,879.04/x
  3. Step 3: Cross multiply
    78,689.14x = 108,590.53 × 42,879.04
  4. Step 4: Simplify right side
    78,689.14x = 4,656,257,679.49
  5. Step 5: Solve for x
    x = 4,656,257,679.49/78,689.14
  6. Step 6: Final answer
    x = 59,172.81

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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.