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Finding the Fourth Proportional to 86,590.40, 129,770.78 and 44,468.78

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Solution

The fourth proportional to 86,590.40, 129,770.78 and 44,468.78 is: 66,644.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,590.40 : 129,770.78 = 44,468.78 : x
  2. Step 2: Convert to fraction form
    86,590.40/129,770.78 = 44,468.78/x
  3. Step 3: Cross multiply
    86,590.40x = 129,770.78 × 44,468.78
  4. Step 4: Simplify right side
    86,590.40x = 5,770,747,395.05
  5. Step 5: Solve for x
    x = 5,770,747,395.05/86,590.40
  6. Step 6: Final answer
    x = 66,644.20

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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.