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Finding the Fourth Proportional to 199,863.52, 299,831.28 and 66,730.72

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Solution

The fourth proportional to 199,863.52, 299,831.28 and 66,730.72 is: 100,108.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,863.52 : 299,831.28 = 66,730.72 : x
  2. Step 2: Convert to fraction form
    199,863.52/299,831.28 = 66,730.72/x
  3. Step 3: Cross multiply
    199,863.52x = 299,831.28 × 66,730.72
  4. Step 4: Simplify right side
    199,863.52x = 20,007,957,192.92
  5. Step 5: Solve for x
    x = 20,007,957,192.92/199,863.52
  6. Step 6: Final answer
    x = 100,108.10

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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.