Home / 78,277.12-117,376.64-25,680.64

Finding the Fourth Proportional to 78,277.12, 117,376.64 and 25,680.64

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Solution

The fourth proportional to 78,277.12, 117,376.64 and 25,680.64 is: 38,508.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,277.12 : 117,376.64 = 25,680.64 : x
  2. Step 2: Convert to fraction form
    78,277.12/117,376.64 = 25,680.64/x
  3. Step 3: Cross multiply
    78,277.12x = 117,376.64 × 25,680.64
  4. Step 4: Simplify right side
    78,277.12x = 3,014,307,236.25
  5. Step 5: Solve for x
    x = 3,014,307,236.25/78,277.12
  6. Step 6: Final answer
    x = 38,508.15

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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.