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Finding the Fourth Proportional to 203,254.55, 280,468.15 and 112,587.90

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Solution

The fourth proportional to 203,254.55, 280,468.15 and 112,587.90 is: 155,358.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,254.55 : 280,468.15 = 112,587.90 : x
  2. Step 2: Convert to fraction form
    203,254.55/280,468.15 = 112,587.90/x
  3. Step 3: Cross multiply
    203,254.55x = 280,468.15 × 112,587.90
  4. Step 4: Simplify right side
    203,254.55x = 31,577,320,025.39
  5. Step 5: Solve for x
    x = 31,577,320,025.39/203,254.55
  6. Step 6: Final answer
    x = 155,358.49

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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.