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Finding the Fourth Proportional to 128,149.09, 176,838.42 and 76,524.44

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Solution

The fourth proportional to 128,149.09, 176,838.42 and 76,524.44 is: 105,599.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,149.09 : 176,838.42 = 76,524.44 : x
  2. Step 2: Convert to fraction form
    128,149.09/176,838.42 = 76,524.44/x
  3. Step 3: Cross multiply
    128,149.09x = 176,838.42 × 76,524.44
  4. Step 4: Simplify right side
    128,149.09x = 13,532,461,906.39
  5. Step 5: Solve for x
    x = 13,532,461,906.39/128,149.09
  6. Step 6: Final answer
    x = 105,599.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.