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Finding the Fourth Proportional to 86,389.43, 129,583.62 and 22,347.58

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Solution

The fourth proportional to 86,389.43, 129,583.62 and 22,347.58 is: 33,521.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,389.43 : 129,583.62 = 22,347.58 : x
  2. Step 2: Convert to fraction form
    86,389.43/129,583.62 = 22,347.58/x
  3. Step 3: Cross multiply
    86,389.43x = 129,583.62 × 22,347.58
  4. Step 4: Simplify right side
    86,389.43x = 2,895,879,990.68
  5. Step 5: Solve for x
    x = 2,895,879,990.68/86,389.43
  6. Step 6: Final answer
    x = 33,521.23

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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.