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Finding the Fourth Proportional to 139,316.43, 192,254.99 and 75,654.69

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Solution

The fourth proportional to 139,316.43, 192,254.99 and 75,654.69 is: 104,402.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,316.43 : 192,254.99 = 75,654.69 : x
  2. Step 2: Convert to fraction form
    139,316.43/192,254.99 = 75,654.69/x
  3. Step 3: Cross multiply
    139,316.43x = 192,254.99 × 75,654.69
  4. Step 4: Simplify right side
    139,316.43x = 14,544,990,570.17
  5. Step 5: Solve for x
    x = 14,544,990,570.17/139,316.43
  6. Step 6: Final answer
    x = 104,402.55

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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.