Home / 86,568.40-129,836.20-30,395.31

Finding the Fourth Proportional to 86,568.40, 129,836.20 and 30,395.31

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Solution

The fourth proportional to 86,568.40, 129,836.20 and 30,395.31 is: 45,587.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,568.40 : 129,836.20 = 30,395.31 : x
  2. Step 2: Convert to fraction form
    86,568.40/129,836.20 = 30,395.31/x
  3. Step 3: Cross multiply
    86,568.40x = 129,836.20 × 30,395.31
  4. Step 4: Simplify right side
    86,568.40x = 3,946,411,548.22
  5. Step 5: Solve for x
    x = 3,946,411,548.22/86,568.40
  6. Step 6: Final answer
    x = 45,587.21

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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.