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Finding the Fourth Proportional to 203,340.39, 280,602.10 and 112,697.90

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Solution

The fourth proportional to 203,340.39, 280,602.10 and 112,697.90 is: 155,518.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,340.39 : 280,602.10 = 112,697.90 : x
  2. Step 2: Convert to fraction form
    203,340.39/280,602.10 = 112,697.90/x
  3. Step 3: Cross multiply
    203,340.39x = 280,602.10 × 112,697.90
  4. Step 4: Simplify right side
    203,340.39x = 31,623,267,825.35
  5. Step 5: Solve for x
    x = 31,623,267,825.35/203,340.39
  6. Step 6: Final answer
    x = 155,518.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.