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Finding the Fourth Proportional to 86,511.18, 129,786 and 26,548

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Solution

The fourth proportional to 86,511.18, 129,786 and 26,548 is: 39,827.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,511.18 : 129,786 = 26,548 : x
  2. Step 2: Convert to fraction form
    86,511.18/129,786 = 26,548/x
  3. Step 3: Cross multiply
    86,511.18x = 129,786 × 26,548
  4. Step 4: Simplify right side
    86,511.18x = 3,445,558,728
  5. Step 5: Solve for x
    x = 3,445,558,728/86,511.18
  6. Step 6: Final answer
    x = 39,827.90

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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.