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Finding the Fourth Proportional to 101,158.70, 151,738.05 and 81,475.70

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Solution

The fourth proportional to 101,158.70, 151,738.05 and 81,475.70 is: 122,213.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,158.70 : 151,738.05 = 81,475.70 : x
  2. Step 2: Convert to fraction form
    101,158.70/151,738.05 = 81,475.70/x
  3. Step 3: Cross multiply
    101,158.70x = 151,738.05 × 81,475.70
  4. Step 4: Simplify right side
    101,158.70x = 12,362,963,840.39
  5. Step 5: Solve for x
    x = 12,362,963,840.39/101,158.70
  6. Step 6: Final answer
    x = 122,213.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.