Home / 78,739.16-108,660.68-42,929.43

Finding the Fourth Proportional to 78,739.16, 108,660.68 and 42,929.43

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Solution

The fourth proportional to 78,739.16, 108,660.68 and 42,929.43 is: 59,242.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,739.16 : 108,660.68 = 42,929.43 : x
  2. Step 2: Convert to fraction form
    78,739.16/108,660.68 = 42,929.43/x
  3. Step 3: Cross multiply
    78,739.16x = 108,660.68 × 42,929.43
  4. Step 4: Simplify right side
    78,739.16x = 4,664,740,841.17
  5. Step 5: Solve for x
    x = 4,664,740,841.17/78,739.16
  6. Step 6: Final answer
    x = 59,242.96

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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.