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Finding the Fourth Proportional to 192,387.15, 288,585.72 and 91,161.59

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Solution

The fourth proportional to 192,387.15, 288,585.72 and 91,161.59 is: 136,744.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,387.15 : 288,585.72 = 91,161.59 : x
  2. Step 2: Convert to fraction form
    192,387.15/288,585.72 = 91,161.59/x
  3. Step 3: Cross multiply
    192,387.15x = 288,585.72 × 91,161.59
  4. Step 4: Simplify right side
    192,387.15x = 26,307,931,643.57
  5. Step 5: Solve for x
    x = 26,307,931,643.57/192,387.15
  6. Step 6: Final answer
    x = 136,744.74

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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.