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Finding the Fourth Proportional to 128,304.56, 177,056.62 and 70,942.88

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Solution

The fourth proportional to 128,304.56, 177,056.62 and 70,942.88 is: 97,899.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,304.56 : 177,056.62 = 70,942.88 : x
  2. Step 2: Convert to fraction form
    128,304.56/177,056.62 = 70,942.88/x
  3. Step 3: Cross multiply
    128,304.56x = 177,056.62 × 70,942.88
  4. Step 4: Simplify right side
    128,304.56x = 12,560,906,811.15
  5. Step 5: Solve for x
    x = 12,560,906,811.15/128,304.56
  6. Step 6: Final answer
    x = 97,899.14

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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.