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Finding the Fourth Proportional to 128,239.48, 192,363.13 and 43,998.46

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Solution

The fourth proportional to 128,239.48, 192,363.13 and 43,998.46 is: 65,999.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,239.48 : 192,363.13 = 43,998.46 : x
  2. Step 2: Convert to fraction form
    128,239.48/192,363.13 = 43,998.46/x
  3. Step 3: Cross multiply
    128,239.48x = 192,363.13 × 43,998.46
  4. Step 4: Simplify right side
    128,239.48x = 8,463,680,931.12
  5. Step 5: Solve for x
    x = 8,463,680,931.12/128,239.48
  6. Step 6: Final answer
    x = 65,999.03

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1.5x scale

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.