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Finding the Fourth Proportional to 228,707.88, 315,616.89 and 139,283.88

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Solution

The fourth proportional to 228,707.88, 315,616.89 and 139,283.88 is: 192,211.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,707.88 : 315,616.89 = 139,283.88 : x
  2. Step 2: Convert to fraction form
    228,707.88/315,616.89 = 139,283.88/x
  3. Step 3: Cross multiply
    228,707.88x = 315,616.89 × 139,283.88
  4. Step 4: Simplify right side
    228,707.88x = 43,960,345,032.73
  5. Step 5: Solve for x
    x = 43,960,345,032.73/228,707.88
  6. Step 6: Final answer
    x = 192,211.76

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1.5x scale

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.