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Finding the Fourth Proportional to 103,807.40, 155,451.90 and 68,556.20

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Solution

The fourth proportional to 103,807.40, 155,451.90 and 68,556.20 is: 102,663.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,807.40 : 155,451.90 = 68,556.20 : x
  2. Step 2: Convert to fraction form
    103,807.40/155,451.90 = 68,556.20/x
  3. Step 3: Cross multiply
    103,807.40x = 155,451.90 × 68,556.20
  4. Step 4: Simplify right side
    103,807.40x = 10,657,191,546.78
  5. Step 5: Solve for x
    x = 10,657,191,546.78/103,807.40
  6. Step 6: Final answer
    x = 102,663.12

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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.