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Finding the Fourth Proportional to 122,688.50, 169,308.51 and 68,240.30

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Solution

The fourth proportional to 122,688.50, 169,308.51 and 68,240.30 is: 94,170.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,688.50 : 169,308.51 = 68,240.30 : x
  2. Step 2: Convert to fraction form
    122,688.50/169,308.51 = 68,240.30/x
  3. Step 3: Cross multiply
    122,688.50x = 169,308.51 × 68,240.30
  4. Step 4: Simplify right side
    122,688.50x = 11,553,663,514.95
  5. Step 5: Solve for x
    x = 11,553,663,514.95/122,688.50
  6. Step 6: Final answer
    x = 94,170.71

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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.