Home / 121,688.48-167,883.92-79,283.36

Finding the Fourth Proportional to 121,688.48, 167,883.92 and 79,283.36

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Solution

The fourth proportional to 121,688.48, 167,883.92 and 79,283.36 is: 109,380.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,688.48 : 167,883.92 = 79,283.36 : x
  2. Step 2: Convert to fraction form
    121,688.48/167,883.92 = 79,283.36/x
  3. Step 3: Cross multiply
    121,688.48x = 167,883.92 × 79,283.36
  4. Step 4: Simplify right side
    121,688.48x = 13,310,401,267.57
  5. Step 5: Solve for x
    x = 13,310,401,267.57/121,688.48
  6. Step 6: Final answer
    x = 109,380.95

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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.