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Finding the Fourth Proportional to 86,390.82, 119,220.52 and 48,149.30

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Solution

The fourth proportional to 86,390.82, 119,220.52 and 48,149.30 is: 66,446.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,390.82 : 119,220.52 = 48,149.30 : x
  2. Step 2: Convert to fraction form
    86,390.82/119,220.52 = 48,149.30/x
  3. Step 3: Cross multiply
    86,390.82x = 119,220.52 × 48,149.30
  4. Step 4: Simplify right side
    86,390.82x = 5,740,384,165.21
  5. Step 5: Solve for x
    x = 5,740,384,165.21/86,390.82
  6. Step 6: Final answer
    x = 66,446.70

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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.