Home / 78,739.06-108,658.44-42,929.38

Finding the Fourth Proportional to 78,739.06, 108,658.44 and 42,929.38

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Solution

The fourth proportional to 78,739.06, 108,658.44 and 42,929.38 is: 59,241.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,739.06 : 108,658.44 = 42,929.38 : x
  2. Step 2: Convert to fraction form
    78,739.06/108,658.44 = 42,929.38/x
  3. Step 3: Cross multiply
    78,739.06x = 108,658.44 × 42,929.38
  4. Step 4: Simplify right side
    78,739.06x = 4,664,639,460.97
  5. Step 5: Solve for x
    x = 4,664,639,460.97/78,739.06
  6. Step 6: Final answer
    x = 59,241.75

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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.