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Finding the Fourth Proportional to 200,620.61, 300,970.28 and 74,261.96

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Solution

The fourth proportional to 200,620.61, 300,970.28 and 74,261.96 is: 111,407.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,620.61 : 300,970.28 = 74,261.96 : x
  2. Step 2: Convert to fraction form
    200,620.61/300,970.28 = 74,261.96/x
  3. Step 3: Cross multiply
    200,620.61x = 300,970.28 × 74,261.96
  4. Step 4: Simplify right side
    200,620.61x = 22,350,642,894.55
  5. Step 5: Solve for x
    x = 22,350,642,894.55/200,620.61
  6. Step 6: Final answer
    x = 111,407.51

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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.