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Finding the Fourth Proportional to 168,311.76, 252,433.08 and 63,128.40

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Solution

The fourth proportional to 168,311.76, 252,433.08 and 63,128.40 is: 94,679.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,311.76 : 252,433.08 = 63,128.40 : x
  2. Step 2: Convert to fraction form
    168,311.76/252,433.08 = 63,128.40/x
  3. Step 3: Cross multiply
    168,311.76x = 252,433.08 × 63,128.40
  4. Step 4: Simplify right side
    168,311.76x = 15,935,696,447.47
  5. Step 5: Solve for x
    x = 15,935,696,447.47/168,311.76
  6. Step 6: Final answer
    x = 94,679.64

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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.