Home / 86,350.40-129,487.20-39,617.60

Finding the Fourth Proportional to 86,350.40, 129,487.20 and 39,617.60

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Solution

The fourth proportional to 86,350.40, 129,487.20 and 39,617.60 is: 59,408.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,350.40 : 129,487.20 = 39,617.60 : x
  2. Step 2: Convert to fraction form
    86,350.40/129,487.20 = 39,617.60/x
  3. Step 3: Cross multiply
    86,350.40x = 129,487.20 × 39,617.60
  4. Step 4: Simplify right side
    86,350.40x = 5,129,972,094.72
  5. Step 5: Solve for x
    x = 5,129,972,094.72/86,350.40
  6. Step 6: Final answer
    x = 59,408.78

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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.