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Finding the Fourth Proportional to 86,358.80, 129,575.82 and 30,239.22

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Solution

The fourth proportional to 86,358.80, 129,575.82 and 30,239.22 is: 45,372.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,358.80 : 129,575.82 = 30,239.22 : x
  2. Step 2: Convert to fraction form
    86,358.80/129,575.82 = 30,239.22/x
  3. Step 3: Cross multiply
    86,358.80x = 129,575.82 × 30,239.22
  4. Step 4: Simplify right side
    86,358.80x = 3,918,271,727.66
  5. Step 5: Solve for x
    x = 3,918,271,727.66/86,358.80
  6. Step 6: Final answer
    x = 45,372.00

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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.