Home / 86,405.47-129,621.85-30,244.21

Finding the Fourth Proportional to 86,405.47, 129,621.85 and 30,244.21

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Solution

The fourth proportional to 86,405.47, 129,621.85 and 30,244.21 is: 45,371.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,405.47 : 129,621.85 = 30,244.21 : x
  2. Step 2: Convert to fraction form
    86,405.47/129,621.85 = 30,244.21/x
  3. Step 3: Cross multiply
    86,405.47x = 129,621.85 × 30,244.21
  4. Step 4: Simplify right side
    86,405.47x = 3,920,310,052.32
  5. Step 5: Solve for x
    x = 3,920,310,052.32/86,405.47
  6. Step 6: Final answer
    x = 45,371.09

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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.