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Finding the Fourth Proportional to 122,810, 169,477.80 and 69,818

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Solution

The fourth proportional to 122,810, 169,477.80 and 69,818 is: 96,348.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,810 : 169,477.80 = 69,818 : x
  2. Step 2: Convert to fraction form
    122,810/169,477.80 = 69,818/x
  3. Step 3: Cross multiply
    122,810x = 169,477.80 × 69,818
  4. Step 4: Simplify right side
    122,810x = 11,832,601,040.40
  5. Step 5: Solve for x
    x = 11,832,601,040.40/122,810
  6. Step 6: Final answer
    x = 96,348.84

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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.