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Finding the Fourth Proportional to 121,756.62, 168,024.36 and 68,041.64

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Solution

The fourth proportional to 121,756.62, 168,024.36 and 68,041.64 is: 93,897.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,756.62 : 168,024.36 = 68,041.64 : x
  2. Step 2: Convert to fraction form
    121,756.62/168,024.36 = 68,041.64/x
  3. Step 3: Cross multiply
    121,756.62x = 168,024.36 × 68,041.64
  4. Step 4: Simplify right side
    121,756.62x = 11,432,653,014.35
  5. Step 5: Solve for x
    x = 11,432,653,014.35/121,756.62
  6. Step 6: Final answer
    x = 93,897.59

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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.