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Finding the Fourth Proportional to 78,955.16, 108,959.68 and 43,147.38

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Solution

The fourth proportional to 78,955.16, 108,959.68 and 43,147.38 is: 59,544.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,955.16 : 108,959.68 = 43,147.38 : x
  2. Step 2: Convert to fraction form
    78,955.16/108,959.68 = 43,147.38/x
  3. Step 3: Cross multiply
    78,955.16x = 108,959.68 × 43,147.38
  4. Step 4: Simplify right side
    78,955.16x = 4,701,325,180.17
  5. Step 5: Solve for x
    x = 4,701,325,180.17/78,955.16
  6. Step 6: Final answer
    x = 59,544.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.