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Finding the Fourth Proportional to 129,897.69, 194,866.92 and 55,018.26

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Solution

The fourth proportional to 129,897.69, 194,866.92 and 55,018.26 is: 82,536.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,897.69 : 194,866.92 = 55,018.26 : x
  2. Step 2: Convert to fraction form
    129,897.69/194,866.92 = 55,018.26/x
  3. Step 3: Cross multiply
    129,897.69x = 194,866.92 × 55,018.26
  4. Step 4: Simplify right side
    129,897.69x = 10,721,238,869.96
  5. Step 5: Solve for x
    x = 10,721,238,869.96/129,897.69
  6. Step 6: Final answer
    x = 82,536.02

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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.