Home / 86,239.77-129,360.21-30,079.66

Finding the Fourth Proportional to 86,239.77, 129,360.21 and 30,079.66

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Solution

The fourth proportional to 86,239.77, 129,360.21 and 30,079.66 is: 45,119.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,239.77 : 129,360.21 = 30,079.66 : x
  2. Step 2: Convert to fraction form
    86,239.77/129,360.21 = 30,079.66/x
  3. Step 3: Cross multiply
    86,239.77x = 129,360.21 × 30,079.66
  4. Step 4: Simplify right side
    86,239.77x = 3,891,111,134.33
  5. Step 5: Solve for x
    x = 3,891,111,134.33/86,239.77
  6. Step 6: Final answer
    x = 45,119.68

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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.