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Finding the Fourth Proportional to 121,756.67, 168,023.71 and 68,041.68

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Solution

The fourth proportional to 121,756.67, 168,023.71 and 68,041.68 is: 93,897.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,756.67 : 168,023.71 = 68,041.68 : x
  2. Step 2: Convert to fraction form
    121,756.67/168,023.71 = 68,041.68/x
  3. Step 3: Cross multiply
    121,756.67x = 168,023.71 × 68,041.68
  4. Step 4: Simplify right side
    121,756.67x = 11,432,614,963.20
  5. Step 5: Solve for x
    x = 11,432,614,963.20/121,756.67
  6. Step 6: Final answer
    x = 93,897.24

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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.