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Finding the Fourth Proportional to 128,800.58, 193,256.49 and 69,677.87

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Solution

The fourth proportional to 128,800.58, 193,256.49 and 69,677.87 is: 104,546.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,800.58 : 193,256.49 = 69,677.87 : x
  2. Step 2: Convert to fraction form
    128,800.58/193,256.49 = 69,677.87/x
  3. Step 3: Cross multiply
    128,800.58x = 193,256.49 × 69,677.87
  4. Step 4: Simplify right side
    128,800.58x = 13,465,700,586.88
  5. Step 5: Solve for x
    x = 13,465,700,586.88/128,800.58
  6. Step 6: Final answer
    x = 104,546.89

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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.