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Finding the Fourth Proportional to 86,506.88, 119,379.30 and 48,780.86

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Solution

The fourth proportional to 86,506.88, 119,379.30 and 48,780.86 is: 67,317.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,506.88 : 119,379.30 = 48,780.86 : x
  2. Step 2: Convert to fraction form
    86,506.88/119,379.30 = 48,780.86/x
  3. Step 3: Cross multiply
    86,506.88x = 119,379.30 × 48,780.86
  4. Step 4: Simplify right side
    86,506.88x = 5,823,424,920.20
  5. Step 5: Solve for x
    x = 5,823,424,920.20/86,506.88
  6. Step 6: Final answer
    x = 67,317.48

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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.