Home / 78,746.96-118,144.28-28,139.36

Finding the Fourth Proportional to 78,746.96, 118,144.28 and 28,139.36

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Solution

The fourth proportional to 78,746.96, 118,144.28 and 28,139.36 is: 42,217.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,746.96 : 118,144.28 = 28,139.36 : x
  2. Step 2: Convert to fraction form
    78,746.96/118,144.28 = 28,139.36/x
  3. Step 3: Cross multiply
    78,746.96x = 118,144.28 × 28,139.36
  4. Step 4: Simplify right side
    78,746.96x = 3,324,504,286.16
  5. Step 5: Solve for x
    x = 3,324,504,286.16/78,746.96
  6. Step 6: Final answer
    x = 42,217.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.