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Finding the Fourth Proportional to 122,905.94, 169,598.46 and 90,658.10

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Solution

The fourth proportional to 122,905.94, 169,598.46 and 90,658.10 is: 125,099.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,905.94 : 169,598.46 = 90,658.10 : x
  2. Step 2: Convert to fraction form
    122,905.94/169,598.46 = 90,658.10/x
  3. Step 3: Cross multiply
    122,905.94x = 169,598.46 × 90,658.10
  4. Step 4: Simplify right side
    122,905.94x = 15,375,474,146.53
  5. Step 5: Solve for x
    x = 15,375,474,146.53/122,905.94
  6. Step 6: Final answer
    x = 125,099.52

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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.