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Finding the Fourth Proportional to 129,797.79, 194,695.80 and 69,854.47

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Solution

The fourth proportional to 129,797.79, 194,695.80 and 69,854.47 is: 104,781.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,797.79 : 194,695.80 = 69,854.47 : x
  2. Step 2: Convert to fraction form
    129,797.79/194,695.80 = 69,854.47/x
  3. Step 3: Cross multiply
    129,797.79x = 194,695.80 × 69,854.47
  4. Step 4: Simplify right side
    129,797.79x = 13,600,371,920.23
  5. Step 5: Solve for x
    x = 13,600,371,920.23/129,797.79
  6. Step 6: Final answer
    x = 104,781.23

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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.