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Finding the Fourth Proportional to 122,308.40, 183,243.90 and 103,500.20

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Solution

The fourth proportional to 122,308.40, 183,243.90 and 103,500.20 is: 155,065.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,308.40 : 183,243.90 = 103,500.20 : x
  2. Step 2: Convert to fraction form
    122,308.40/183,243.90 = 103,500.20/x
  3. Step 3: Cross multiply
    122,308.40x = 183,243.90 × 103,500.20
  4. Step 4: Simplify right side
    122,308.40x = 18,965,780,298.78
  5. Step 5: Solve for x
    x = 18,965,780,298.78/122,308.40
  6. Step 6: Final answer
    x = 155,065.23

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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.