Home / 138,929.78-208,173.23-88,968.78

Finding the Fourth Proportional to 138,929.78, 208,173.23 and 88,968.78

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Solution

The fourth proportional to 138,929.78, 208,173.23 and 88,968.78 is: 133,311.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,929.78 : 208,173.23 = 88,968.78 : x
  2. Step 2: Convert to fraction form
    138,929.78/208,173.23 = 88,968.78/x
  3. Step 3: Cross multiply
    138,929.78x = 208,173.23 × 88,968.78
  4. Step 4: Simplify right side
    138,929.78x = 18,520,918,301.76
  5. Step 5: Solve for x
    x = 18,520,918,301.76/138,929.78
  6. Step 6: Final answer
    x = 133,311.36

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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.