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Finding the Fourth Proportional to 86,532.84, 129,536.22 and 55,389.96

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Solution

The fourth proportional to 86,532.84, 129,536.22 and 55,389.96 is: 82,916.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,532.84 : 129,536.22 = 55,389.96 : x
  2. Step 2: Convert to fraction form
    86,532.84/129,536.22 = 55,389.96/x
  3. Step 3: Cross multiply
    86,532.84x = 129,536.22 × 55,389.96
  4. Step 4: Simplify right side
    86,532.84x = 7,175,006,044.35
  5. Step 5: Solve for x
    x = 7,175,006,044.35/86,532.84
  6. Step 6: Final answer
    x = 82,916.57

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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.