Home / 78,190.95-117,364.56-43,147.11

Finding the Fourth Proportional to 78,190.95, 117,364.56 and 43,147.11

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Solution

The fourth proportional to 78,190.95, 117,364.56 and 43,147.11 is: 64,763.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,190.95 : 117,364.56 = 43,147.11 : x
  2. Step 2: Convert to fraction form
    78,190.95/117,364.56 = 43,147.11/x
  3. Step 3: Cross multiply
    78,190.95x = 117,364.56 × 43,147.11
  4. Step 4: Simplify right side
    78,190.95x = 5,063,941,580.42
  5. Step 5: Solve for x
    x = 5,063,941,580.42/78,190.95
  6. Step 6: Final answer
    x = 64,763.78

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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.