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Finding the Fourth Proportional to 122,477.52, 169,017.54 and 68,761.20

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Solution

The fourth proportional to 122,477.52, 169,017.54 and 68,761.20 is: 94,889.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,477.52 : 169,017.54 = 68,761.20 : x
  2. Step 2: Convert to fraction form
    122,477.52/169,017.54 = 68,761.20/x
  3. Step 3: Cross multiply
    122,477.52x = 169,017.54 × 68,761.20
  4. Step 4: Simplify right side
    122,477.52x = 11,621,848,871.45
  5. Step 5: Solve for x
    x = 11,621,848,871.45/122,477.52
  6. Step 6: Final answer
    x = 94,889.65

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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.