Home / 86,390.57-129,599.75-30,229.43

Finding the Fourth Proportional to 86,390.57, 129,599.75 and 30,229.43

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Solution

The fourth proportional to 86,390.57, 129,599.75 and 30,229.43 is: 45,349.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,390.57 : 129,599.75 = 30,229.43 : x
  2. Step 2: Convert to fraction form
    86,390.57/129,599.75 = 30,229.43/x
  3. Step 3: Cross multiply
    86,390.57x = 129,599.75 × 30,229.43
  4. Step 4: Simplify right side
    86,390.57x = 3,917,725,771.50
  5. Step 5: Solve for x
    x = 3,917,725,771.50/86,390.57
  6. Step 6: Final answer
    x = 45,349.00

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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.