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Finding the Fourth Proportional to 228,864.57, 342,854.06 and 128,720.49

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Solution

The fourth proportional to 228,864.57, 342,854.06 and 128,720.49 is: 192,831.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,864.57 : 342,854.06 = 128,720.49 : x
  2. Step 2: Convert to fraction form
    228,864.57/342,854.06 = 128,720.49/x
  3. Step 3: Cross multiply
    228,864.57x = 342,854.06 × 128,720.49
  4. Step 4: Simplify right side
    228,864.57x = 44,132,341,958.09
  5. Step 5: Solve for x
    x = 44,132,341,958.09/228,864.57
  6. Step 6: Final answer
    x = 192,831.69

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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.