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Finding the Fourth Proportional to 128,756.52, 193,003.02 and 49,840.20

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Solution

The fourth proportional to 128,756.52, 193,003.02 and 49,840.20 is: 74,709.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,756.52 : 193,003.02 = 49,840.20 : x
  2. Step 2: Convert to fraction form
    128,756.52/193,003.02 = 49,840.20/x
  3. Step 3: Cross multiply
    128,756.52x = 193,003.02 × 49,840.20
  4. Step 4: Simplify right side
    128,756.52x = 9,619,309,117.40
  5. Step 5: Solve for x
    x = 9,619,309,117.40/128,756.52
  6. Step 6: Final answer
    x = 74,709.30

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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.