Home / 78,078.28-117,275.80-68,925.68

Finding the Fourth Proportional to 78,078.28, 117,275.80 and 68,925.68

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Solution

The fourth proportional to 78,078.28, 117,275.80 and 68,925.68 is: 103,528.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,078.28 : 117,275.80 = 68,925.68 : x
  2. Step 2: Convert to fraction form
    78,078.28/117,275.80 = 68,925.68/x
  3. Step 3: Cross multiply
    78,078.28x = 117,275.80 × 68,925.68
  4. Step 4: Simplify right side
    78,078.28x = 8,083,314,262.54
  5. Step 5: Solve for x
    x = 8,083,314,262.54/78,078.28
  6. Step 6: Final answer
    x = 103,528.33

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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.