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Finding the Fourth Proportional to 121,647.42, 167,863.74 and 67,929.24

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Solution

The fourth proportional to 121,647.42, 167,863.74 and 67,929.24 is: 93,736.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,647.42 : 167,863.74 = 67,929.24 : x
  2. Step 2: Convert to fraction form
    121,647.42/167,863.74 = 67,929.24/x
  3. Step 3: Cross multiply
    121,647.42x = 167,863.74 × 67,929.24
  4. Step 4: Simplify right side
    121,647.42x = 11,402,856,281.76
  5. Step 5: Solve for x
    x = 11,402,856,281.76/121,647.42
  6. Step 6: Final answer
    x = 93,736.93

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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.