Home / 86,357.20-129,539-30,186.32

Finding the Fourth Proportional to 86,357.20, 129,539 and 30,186.32

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Solution

The fourth proportional to 86,357.20, 129,539 and 30,186.32 is: 45,280.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,357.20 : 129,539 = 30,186.32 : x
  2. Step 2: Convert to fraction form
    86,357.20/129,539 = 30,186.32/x
  3. Step 3: Cross multiply
    86,357.20x = 129,539 × 30,186.32
  4. Step 4: Simplify right side
    86,357.20x = 3,910,305,706.48
  5. Step 5: Solve for x
    x = 3,910,305,706.48/86,357.20
  6. Step 6: Final answer
    x = 45,280.60

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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.