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Finding the Fourth Proportional to 86,897.43, 119,856.60 and 79,750.42

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Solution

The fourth proportional to 86,897.43, 119,856.60 and 79,750.42 is: 109,998.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,897.43 : 119,856.60 = 79,750.42 : x
  2. Step 2: Convert to fraction form
    86,897.43/119,856.60 = 79,750.42/x
  3. Step 3: Cross multiply
    86,897.43x = 119,856.60 × 79,750.42
  4. Step 4: Simplify right side
    86,897.43x = 9,558,614,189.77
  5. Step 5: Solve for x
    x = 9,558,614,189.77/86,897.43
  6. Step 6: Final answer
    x = 109,998.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.