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Finding the Fourth Proportional to 122,402.46, 168,918.74 and 68,690.76

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Solution

The fourth proportional to 122,402.46, 168,918.74 and 68,690.76 is: 94,795.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,402.46 : 168,918.74 = 68,690.76 : x
  2. Step 2: Convert to fraction form
    122,402.46/168,918.74 = 68,690.76/x
  3. Step 3: Cross multiply
    122,402.46x = 168,918.74 × 68,690.76
  4. Step 4: Simplify right side
    122,402.46x = 11,603,156,628.84
  5. Step 5: Solve for x
    x = 11,603,156,628.84/122,402.46
  6. Step 6: Final answer
    x = 94,795.13

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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.