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Finding the Fourth Proportional to 78,342.90, 117,534.60 and 33,959.40

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Solution

The fourth proportional to 78,342.90, 117,534.60 and 33,959.40 is: 50,947.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,342.90 : 117,534.60 = 33,959.40 : x
  2. Step 2: Convert to fraction form
    78,342.90/117,534.60 = 33,959.40/x
  3. Step 3: Cross multiply
    78,342.90x = 117,534.60 × 33,959.40
  4. Step 4: Simplify right side
    78,342.90x = 3,991,404,495.24
  5. Step 5: Solve for x
    x = 3,991,404,495.24/78,342.90
  6. Step 6: Final answer
    x = 50,947.88

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1.5x scale

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.