Home / 86,589.07-129,890.99-30,424.31

Finding the Fourth Proportional to 86,589.07, 129,890.99 and 30,424.31

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Solution

The fourth proportional to 86,589.07, 129,890.99 and 30,424.31 is: 45,639.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,589.07 : 129,890.99 = 30,424.31 : x
  2. Step 2: Convert to fraction form
    86,589.07/129,890.99 = 30,424.31/x
  3. Step 3: Cross multiply
    86,589.07x = 129,890.99 × 30,424.31
  4. Step 4: Simplify right side
    86,589.07x = 3,951,843,659.66
  5. Step 5: Solve for x
    x = 3,951,843,659.66/86,589.07
  6. Step 6: Final answer
    x = 45,639.06

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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.