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Finding the Fourth Proportional to 203,988.78, 306,106.29 and 145,312.38

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Solution

The fourth proportional to 203,988.78, 306,106.29 and 145,312.38 is: 218,056.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,988.78 : 306,106.29 = 145,312.38 : x
  2. Step 2: Convert to fraction form
    203,988.78/306,106.29 = 145,312.38/x
  3. Step 3: Cross multiply
    203,988.78x = 306,106.29 × 145,312.38
  4. Step 4: Simplify right side
    203,988.78x = 44,481,033,532.87
  5. Step 5: Solve for x
    x = 44,481,033,532.87/203,988.78
  6. Step 6: Final answer
    x = 218,056.28

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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.