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Finding the Fourth Proportional to 122,128.97, 168,541.76 and 68,401.67

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Solution

The fourth proportional to 122,128.97, 168,541.76 and 68,401.67 is: 94,396.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,128.97 : 168,541.76 = 68,401.67 : x
  2. Step 2: Convert to fraction form
    122,128.97/168,541.76 = 68,401.67/x
  3. Step 3: Cross multiply
    122,128.97x = 168,541.76 × 68,401.67
  4. Step 4: Simplify right side
    122,128.97x = 11,528,537,177.03
  5. Step 5: Solve for x
    x = 11,528,537,177.03/122,128.97
  6. Step 6: Final answer
    x = 94,396.42

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1.5x scale

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.