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Finding the Fourth Proportional to 86,876.72, 119,879.76 and 48,638.36

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Solution

The fourth proportional to 86,876.72, 119,879.76 and 48,638.36 is: 67,115.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,876.72 : 119,879.76 = 48,638.36 : x
  2. Step 2: Convert to fraction form
    86,876.72/119,879.76 = 48,638.36/x
  3. Step 3: Cross multiply
    86,876.72x = 119,879.76 × 48,638.36
  4. Step 4: Simplify right side
    86,876.72x = 5,830,754,923.59
  5. Step 5: Solve for x
    x = 5,830,754,923.59/86,876.72
  6. Step 6: Final answer
    x = 67,115.27

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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.