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Finding the Fourth Proportional to 86,778.63, 119,719.17 and 56,552.94

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Solution

The fourth proportional to 86,778.63, 119,719.17 and 56,552.94 is: 78,020.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,778.63 : 119,719.17 = 56,552.94 : x
  2. Step 2: Convert to fraction form
    86,778.63/119,719.17 = 56,552.94/x
  3. Step 3: Cross multiply
    86,778.63x = 119,719.17 × 56,552.94
  4. Step 4: Simplify right side
    86,778.63x = 6,770,471,037.86
  5. Step 5: Solve for x
    x = 6,770,471,037.86/86,778.63
  6. Step 6: Final answer
    x = 78,020.03

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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.