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Finding the Fourth Proportional to 86,530.72, 119,408.88 and 48,291.92

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Solution

The fourth proportional to 86,530.72, 119,408.88 and 48,291.92 is: 66,640.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,530.72 : 119,408.88 = 48,291.92 : x
  2. Step 2: Convert to fraction form
    86,530.72/119,408.88 = 48,291.92/x
  3. Step 3: Cross multiply
    86,530.72x = 119,408.88 × 48,291.92
  4. Step 4: Simplify right side
    86,530.72x = 5,766,484,080.25
  5. Step 5: Solve for x
    x = 5,766,484,080.25/86,530.72
  6. Step 6: Final answer
    x = 66,640.89

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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.