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Finding the Fourth Proportional to 143,654.10, 215,518.20 and 68,831.98

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Solution

The fourth proportional to 143,654.10, 215,518.20 and 68,831.98 is: 103,265.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,654.10 : 215,518.20 = 68,831.98 : x
  2. Step 2: Convert to fraction form
    143,654.10/215,518.20 = 68,831.98/x
  3. Step 3: Cross multiply
    143,654.10x = 215,518.20 × 68,831.98
  4. Step 4: Simplify right side
    143,654.10x = 14,834,544,432.04
  5. Step 5: Solve for x
    x = 14,834,544,432.04/143,654.10
  6. Step 6: Final answer
    x = 103,265.72

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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.