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Finding the Fourth Proportional to 63,678.68, 87,849.32 and 39,763.83

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Solution

The fourth proportional to 63,678.68, 87,849.32 and 39,763.83 is: 54,857.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,678.68 : 87,849.32 = 39,763.83 : x
  2. Step 2: Convert to fraction form
    63,678.68/87,849.32 = 39,763.83/x
  3. Step 3: Cross multiply
    63,678.68x = 87,849.32 × 39,763.83
  4. Step 4: Simplify right side
    63,678.68x = 3,493,225,227.28
  5. Step 5: Solve for x
    x = 3,493,225,227.28/63,678.68
  6. Step 6: Final answer
    x = 54,857.07

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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.