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Finding the Fourth Proportional to 128,108.56, 192,162.12 and 43,869.46

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Solution

The fourth proportional to 128,108.56, 192,162.12 and 43,869.46 is: 65,803.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,108.56 : 192,162.12 = 43,869.46 : x
  2. Step 2: Convert to fraction form
    128,108.56/192,162.12 = 43,869.46/x
  3. Step 3: Cross multiply
    128,108.56x = 192,162.12 × 43,869.46
  4. Step 4: Simplify right side
    128,108.56x = 8,430,048,436.86
  5. Step 5: Solve for x
    x = 8,430,048,436.86/128,108.56
  6. Step 6: Final answer
    x = 65,803.94

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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.