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Finding the Fourth Proportional to 74,279.80, 111,419.70 and 68,577.40

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Solution

The fourth proportional to 74,279.80, 111,419.70 and 68,577.40 is: 102,866.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,279.80 : 111,419.70 = 68,577.40 : x
  2. Step 2: Convert to fraction form
    74,279.80/111,419.70 = 68,577.40/x
  3. Step 3: Cross multiply
    74,279.80x = 111,419.70 × 68,577.40
  4. Step 4: Simplify right side
    74,279.80x = 7,640,873,334.78
  5. Step 5: Solve for x
    x = 7,640,873,334.78/74,279.80
  6. Step 6: Final answer
    x = 102,866.10

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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.