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Finding the Fourth Proportional to 122,878.70, 169,572.90 and 69,164.48

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Solution

The fourth proportional to 122,878.70, 169,572.90 and 69,164.48 is: 95,447.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,878.70 : 169,572.90 = 69,164.48 : x
  2. Step 2: Convert to fraction form
    122,878.70/169,572.90 = 69,164.48/x
  3. Step 3: Cross multiply
    122,878.70x = 169,572.90 × 69,164.48
  4. Step 4: Simplify right side
    122,878.70x = 11,728,421,450.59
  5. Step 5: Solve for x
    x = 11,728,421,450.59/122,878.70
  6. Step 6: Final answer
    x = 95,447.15

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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.