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Finding the Fourth Proportional to 138,882.63, 208,323 and 39,042.21

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Solution

The fourth proportional to 138,882.63, 208,323 and 39,042.21 is: 58,563.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,882.63 : 208,323 = 39,042.21 : x
  2. Step 2: Convert to fraction form
    138,882.63/208,323 = 39,042.21/x
  3. Step 3: Cross multiply
    138,882.63x = 208,323 × 39,042.21
  4. Step 4: Simplify right side
    138,882.63x = 8,133,390,313.83
  5. Step 5: Solve for x
    x = 8,133,390,313.83/138,882.63
  6. Step 6: Final answer
    x = 58,563.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.