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Finding the Fourth Proportional to 128,975.88, 193,570.44 and 65,842.66

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Solution

The fourth proportional to 128,975.88, 193,570.44 and 65,842.66 is: 98,818.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,975.88 : 193,570.44 = 65,842.66 : x
  2. Step 2: Convert to fraction form
    128,975.88/193,570.44 = 65,842.66/x
  3. Step 3: Cross multiply
    128,975.88x = 193,570.44 × 65,842.66
  4. Step 4: Simplify right side
    128,975.88x = 12,745,192,666.97
  5. Step 5: Solve for x
    x = 12,745,192,666.97/128,975.88
  6. Step 6: Final answer
    x = 98,818.42

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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.