Home / 78,559.07-117,767.12-28,627.78

Finding the Fourth Proportional to 78,559.07, 117,767.12 and 28,627.78

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Solution

The fourth proportional to 78,559.07, 117,767.12 and 28,627.78 is: 42,915.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,559.07 : 117,767.12 = 28,627.78 : x
  2. Step 2: Convert to fraction form
    78,559.07/117,767.12 = 28,627.78/x
  3. Step 3: Cross multiply
    78,559.07x = 117,767.12 × 28,627.78
  4. Step 4: Simplify right side
    78,559.07x = 3,371,410,985.85
  5. Step 5: Solve for x
    x = 3,371,410,985.85/78,559.07
  6. Step 6: Final answer
    x = 42,915.62

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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.