Home / 78,716.18-108,628.38-42,905.46

Finding the Fourth Proportional to 78,716.18, 108,628.38 and 42,905.46

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Solution

The fourth proportional to 78,716.18, 108,628.38 and 42,905.46 is: 59,209.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,716.18 : 108,628.38 = 42,905.46 : x
  2. Step 2: Convert to fraction form
    78,716.18/108,628.38 = 42,905.46/x
  3. Step 3: Cross multiply
    78,716.18x = 108,628.38 × 42,905.46
  4. Step 4: Simplify right side
    78,716.18x = 4,660,750,612.95
  5. Step 5: Solve for x
    x = 4,660,750,612.95/78,716.18
  6. Step 6: Final answer
    x = 59,209.56

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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.