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Finding the Fourth Proportional to 128,964.60, 193,446.90 and 102,526.20

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Solution

The fourth proportional to 128,964.60, 193,446.90 and 102,526.20 is: 153,789.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,964.60 : 193,446.90 = 102,526.20 : x
  2. Step 2: Convert to fraction form
    128,964.60/193,446.90 = 102,526.20/x
  3. Step 3: Cross multiply
    128,964.60x = 193,446.90 × 102,526.20
  4. Step 4: Simplify right side
    128,964.60x = 19,833,375,558.78
  5. Step 5: Solve for x
    x = 19,833,375,558.78/128,964.60
  6. Step 6: Final answer
    x = 153,789.30

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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.