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Finding the Fourth Proportional to 128,386.56, 192,589.56 and 34,890.96

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Solution

The fourth proportional to 128,386.56, 192,589.56 and 34,890.96 is: 52,339.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,386.56 : 192,589.56 = 34,890.96 : x
  2. Step 2: Convert to fraction form
    128,386.56/192,589.56 = 34,890.96/x
  3. Step 3: Cross multiply
    128,386.56x = 192,589.56 × 34,890.96
  4. Step 4: Simplify right side
    128,386.56x = 6,719,634,634.38
  5. Step 5: Solve for x
    x = 6,719,634,634.38/128,386.56
  6. Step 6: Final answer
    x = 52,339.08

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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.