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Finding the Fourth Proportional to 86,665.72, 119,483.04 and 68,819.80

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Solution

The fourth proportional to 86,665.72, 119,483.04 and 68,819.80 is: 94,879.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,665.72 : 119,483.04 = 68,819.80 : x
  2. Step 2: Convert to fraction form
    86,665.72/119,483.04 = 68,819.80/x
  3. Step 3: Cross multiply
    86,665.72x = 119,483.04 × 68,819.80
  4. Step 4: Simplify right side
    86,665.72x = 8,222,798,916.19
  5. Step 5: Solve for x
    x = 8,222,798,916.19/86,665.72
  6. Step 6: Final answer
    x = 94,879.49

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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.