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Finding the Fourth Proportional to 86,379.66, 119,110.69 and 54,102.78

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Solution

The fourth proportional to 86,379.66, 119,110.69 and 54,102.78 is: 74,603.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,379.66 : 119,110.69 = 54,102.78 : x
  2. Step 2: Convert to fraction form
    86,379.66/119,110.69 = 54,102.78/x
  3. Step 3: Cross multiply
    86,379.66x = 119,110.69 × 54,102.78
  4. Step 4: Simplify right side
    86,379.66x = 6,444,219,456.72
  5. Step 5: Solve for x
    x = 6,444,219,456.72/86,379.66
  6. Step 6: Final answer
    x = 74,603.44

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1.5x scale

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.