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Finding the Fourth Proportional to 122,137.92, 168,553.08 and 68,420.16

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Solution

The fourth proportional to 122,137.92, 168,553.08 and 68,420.16 is: 94,421.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,137.92 : 168,553.08 = 68,420.16 : x
  2. Step 2: Convert to fraction form
    122,137.92/168,553.08 = 68,420.16/x
  3. Step 3: Cross multiply
    122,137.92x = 168,553.08 × 68,420.16
  4. Step 4: Simplify right side
    122,137.92x = 11,532,428,702.09
  5. Step 5: Solve for x
    x = 11,532,428,702.09/122,137.92
  6. Step 6: Final answer
    x = 94,421.36

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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.