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Finding the Fourth Proportional to 228,620.66, 315,650.55 and 142,710.44

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Solution

The fourth proportional to 228,620.66, 315,650.55 and 142,710.44 is: 197,036.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,620.66 : 315,650.55 = 142,710.44 : x
  2. Step 2: Convert to fraction form
    228,620.66/315,650.55 = 142,710.44/x
  3. Step 3: Cross multiply
    228,620.66x = 315,650.55 × 142,710.44
  4. Step 4: Simplify right side
    228,620.66x = 45,046,627,298.49
  5. Step 5: Solve for x
    x = 45,046,627,298.49/228,620.66
  6. Step 6: Final answer
    x = 197,036.56

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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.