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Finding the Fourth Proportional to 138,736.64, 208,025.48 and 42,648.84

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Solution

The fourth proportional to 138,736.64, 208,025.48 and 42,648.84 is: 63,948.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,736.64 : 208,025.48 = 42,648.84 : x
  2. Step 2: Convert to fraction form
    138,736.64/208,025.48 = 42,648.84/x
  3. Step 3: Cross multiply
    138,736.64x = 208,025.48 × 42,648.84
  4. Step 4: Simplify right side
    138,736.64x = 8,872,045,519.07
  5. Step 5: Solve for x
    x = 8,872,045,519.07/138,736.64
  6. Step 6: Final answer
    x = 63,948.83

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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.