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Finding the Fourth Proportional to 75,808.40, 113,712.60 and 67,279.10

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Solution

The fourth proportional to 75,808.40, 113,712.60 and 67,279.10 is: 100,918.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,808.40 : 113,712.60 = 67,279.10 : x
  2. Step 2: Convert to fraction form
    75,808.40/113,712.60 = 67,279.10/x
  3. Step 3: Cross multiply
    75,808.40x = 113,712.60 × 67,279.10
  4. Step 4: Simplify right side
    75,808.40x = 7,650,481,386.66
  5. Step 5: Solve for x
    x = 7,650,481,386.66/75,808.40
  6. Step 6: Final answer
    x = 100,918.65

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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.