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Finding the Fourth Proportional to 86,910.91, 119,938.86 and 52,920.81

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Solution

The fourth proportional to 86,910.91, 119,938.86 and 52,920.81 is: 73,031.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,910.91 : 119,938.86 = 52,920.81 : x
  2. Step 2: Convert to fraction form
    86,910.91/119,938.86 = 52,920.81/x
  3. Step 3: Cross multiply
    86,910.91x = 119,938.86 × 52,920.81
  4. Step 4: Simplify right side
    86,910.91x = 6,347,261,621.68
  5. Step 5: Solve for x
    x = 6,347,261,621.68/86,910.91
  6. Step 6: Final answer
    x = 73,031.82

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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.