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Finding the Fourth Proportional to 138,888.44, 208,342.38 and 68,748.92

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Solution

The fourth proportional to 138,888.44, 208,342.38 and 68,748.92 is: 103,128.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,888.44 : 208,342.38 = 68,748.92 : x
  2. Step 2: Convert to fraction form
    138,888.44/208,342.38 = 68,748.92/x
  3. Step 3: Cross multiply
    138,888.44x = 208,342.38 × 68,748.92
  4. Step 4: Simplify right side
    138,888.44x = 14,323,313,615.23
  5. Step 5: Solve for x
    x = 14,323,313,615.23/138,888.44
  6. Step 6: Final answer
    x = 103,128.19

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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.