Home / 121,929.47-168,269.20-68,211.28

Finding the Fourth Proportional to 121,929.47, 168,269.20 and 68,211.28

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Solution

The fourth proportional to 121,929.47, 168,269.20 and 68,211.28 is: 94,135.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,929.47 : 168,269.20 = 68,211.28 : x
  2. Step 2: Convert to fraction form
    121,929.47/168,269.20 = 68,211.28/x
  3. Step 3: Cross multiply
    121,929.47x = 168,269.20 × 68,211.28
  4. Step 4: Simplify right side
    121,929.47x = 11,477,857,010.64
  5. Step 5: Solve for x
    x = 11,477,857,010.64/121,929.47
  6. Step 6: Final answer
    x = 94,135.22

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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.