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Finding the Fourth Proportional to 128,509.84, 192,727.76 and 44,266.60

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Solution

The fourth proportional to 128,509.84, 192,727.76 and 44,266.60 is: 66,387.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,509.84 : 192,727.76 = 44,266.60 : x
  2. Step 2: Convert to fraction form
    128,509.84/192,727.76 = 44,266.60/x
  3. Step 3: Cross multiply
    128,509.84x = 192,727.76 × 44,266.60
  4. Step 4: Simplify right side
    128,509.84x = 8,531,402,660.82
  5. Step 5: Solve for x
    x = 8,531,402,660.82/128,509.84
  6. Step 6: Final answer
    x = 66,387.15

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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.