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Finding the Fourth Proportional to 128,722.70, 193,026.45 and 49,810.70

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Solution

The fourth proportional to 128,722.70, 193,026.45 and 49,810.70 is: 74,693.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,722.70 : 193,026.45 = 49,810.70 : x
  2. Step 2: Convert to fraction form
    128,722.70/193,026.45 = 49,810.70/x
  3. Step 3: Cross multiply
    128,722.70x = 193,026.45 × 49,810.70
  4. Step 4: Simplify right side
    128,722.70x = 9,614,782,593.02
  5. Step 5: Solve for x
    x = 9,614,782,593.02/128,722.70
  6. Step 6: Final answer
    x = 74,693.76

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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.