Home / 86,280.57-129,479.96-30,120.68

Finding the Fourth Proportional to 86,280.57, 129,479.96 and 30,120.68

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Solution

The fourth proportional to 86,280.57, 129,479.96 and 30,120.68 is: 45,201.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,280.57 : 129,479.96 = 30,120.68 : x
  2. Step 2: Convert to fraction form
    86,280.57/129,479.96 = 30,120.68/x
  3. Step 3: Cross multiply
    86,280.57x = 129,479.96 × 30,120.68
  4. Step 4: Simplify right side
    86,280.57x = 3,900,024,840.57
  5. Step 5: Solve for x
    x = 3,900,024,840.57/86,280.57
  6. Step 6: Final answer
    x = 45,201.66

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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.