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Finding the Fourth Proportional to 78,628.88, 117,887.70 and 25,304.34

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Solution

The fourth proportional to 78,628.88, 117,887.70 and 25,304.34 is: 37,938.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,628.88 : 117,887.70 = 25,304.34 : x
  2. Step 2: Convert to fraction form
    78,628.88/117,887.70 = 25,304.34/x
  3. Step 3: Cross multiply
    78,628.88x = 117,887.70 × 25,304.34
  4. Step 4: Simplify right side
    78,628.88x = 2,983,070,442.62
  5. Step 5: Solve for x
    x = 2,983,070,442.62/78,628.88
  6. Step 6: Final answer
    x = 37,938.61

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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.