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Finding the Fourth Proportional to 121,744.71, 168,007.35 and 68,029.78

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Solution

The fourth proportional to 121,744.71, 168,007.35 and 68,029.78 is: 93,880.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,744.71 : 168,007.35 = 68,029.78 : x
  2. Step 2: Convert to fraction form
    121,744.71/168,007.35 = 68,029.78/x
  3. Step 3: Cross multiply
    121,744.71x = 168,007.35 × 68,029.78
  4. Step 4: Simplify right side
    121,744.71x = 11,429,503,058.88
  5. Step 5: Solve for x
    x = 11,429,503,058.88/121,744.71
  6. Step 6: Final answer
    x = 93,880.90

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1.5x scale

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.