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Finding the Fourth Proportional to 122,400.82, 168,911.55 and 68,686.90

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Solution

The fourth proportional to 122,400.82, 168,911.55 and 68,686.90 is: 94,787.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,400.82 : 168,911.55 = 68,686.90 : x
  2. Step 2: Convert to fraction form
    122,400.82/168,911.55 = 68,686.90/x
  3. Step 3: Cross multiply
    122,400.82x = 168,911.55 × 68,686.90
  4. Step 4: Simplify right side
    122,400.82x = 11,602,010,743.70
  5. Step 5: Solve for x
    x = 11,602,010,743.70/122,400.82
  6. Step 6: Final answer
    x = 94,787.03

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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.