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Finding the Fourth Proportional to 128,728.58, 192,841.48 and 61,164.46

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Solution

The fourth proportional to 128,728.58, 192,841.48 and 61,164.46 is: 91,627.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,728.58 : 192,841.48 = 61,164.46 : x
  2. Step 2: Convert to fraction form
    128,728.58/192,841.48 = 61,164.46/x
  3. Step 3: Cross multiply
    128,728.58x = 192,841.48 × 61,164.46
  4. Step 4: Simplify right side
    128,728.58x = 11,795,044,989.80
  5. Step 5: Solve for x
    x = 11,795,044,989.80/128,728.58
  6. Step 6: Final answer
    x = 91,627.24

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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.