Home / 66,135.50-91,267.20-39,279.14

Finding the Fourth Proportional to 66,135.50, 91,267.20 and 39,279.14

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Solution

The fourth proportional to 66,135.50, 91,267.20 and 39,279.14 is: 54,205.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,135.50 : 91,267.20 = 39,279.14 : x
  2. Step 2: Convert to fraction form
    66,135.50/91,267.20 = 39,279.14/x
  3. Step 3: Cross multiply
    66,135.50x = 91,267.20 × 39,279.14
  4. Step 4: Simplify right side
    66,135.50x = 3,584,897,126.21
  5. Step 5: Solve for x
    x = 3,584,897,126.21/66,135.50
  6. Step 6: Final answer
    x = 54,205.34

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1.5x scale

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.