Home / 86,440.13-129,660.20-20,776.13

Finding the Fourth Proportional to 86,440.13, 129,660.20 and 20,776.13

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Solution

The fourth proportional to 86,440.13, 129,660.20 and 20,776.13 is: 31,164.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,440.13 : 129,660.20 = 20,776.13 : x
  2. Step 2: Convert to fraction form
    86,440.13/129,660.20 = 20,776.13/x
  3. Step 3: Cross multiply
    86,440.13x = 129,660.20 × 20,776.13
  4. Step 4: Simplify right side
    86,440.13x = 2,693,837,171.03
  5. Step 5: Solve for x
    x = 2,693,837,171.03/86,440.13
  6. Step 6: Final answer
    x = 31,164.20

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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.