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Finding the Fourth Proportional to 128,875.89, 193,238.49 and 48,919.17

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Solution

The fourth proportional to 128,875.89, 193,238.49 and 48,919.17 is: 73,350.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,875.89 : 193,238.49 = 48,919.17 : x
  2. Step 2: Convert to fraction form
    128,875.89/193,238.49 = 48,919.17/x
  3. Step 3: Cross multiply
    128,875.89x = 193,238.49 × 48,919.17
  4. Step 4: Simplify right side
    128,875.89x = 9,453,066,542.85
  5. Step 5: Solve for x
    x = 9,453,066,542.85/128,875.89
  6. Step 6: Final answer
    x = 73,350.16

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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.