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Finding the Fourth Proportional to 122,650.90, 169,253.80 and 68,938.86

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Solution

The fourth proportional to 122,650.90, 169,253.80 and 68,938.86 is: 95,133.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,650.90 : 169,253.80 = 68,938.86 : x
  2. Step 2: Convert to fraction form
    122,650.90/169,253.80 = 68,938.86/x
  3. Step 3: Cross multiply
    122,650.90x = 169,253.80 × 68,938.86
  4. Step 4: Simplify right side
    122,650.90x = 11,668,164,022.67
  5. Step 5: Solve for x
    x = 11,668,164,022.67/122,650.90
  6. Step 6: Final answer
    x = 95,133.13

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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.