Home / 86,785.12-130,193.12-30,657.79

Finding the Fourth Proportional to 86,785.12, 130,193.12 and 30,657.79

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Solution

The fourth proportional to 86,785.12, 130,193.12 and 30,657.79 is: 45,992.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,785.12 : 130,193.12 = 30,657.79 : x
  2. Step 2: Convert to fraction form
    86,785.12/130,193.12 = 30,657.79/x
  3. Step 3: Cross multiply
    86,785.12x = 130,193.12 × 30,657.79
  4. Step 4: Simplify right side
    86,785.12x = 3,991,433,571.79
  5. Step 5: Solve for x
    x = 3,991,433,571.79/86,785.12
  6. Step 6: Final answer
    x = 45,992.14

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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.