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Finding the Fourth Proportional to 101,318.70, 151,978.17 and 26,438.79

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Solution

The fourth proportional to 101,318.70, 151,978.17 and 26,438.79 is: 39,658.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,318.70 : 151,978.17 = 26,438.79 : x
  2. Step 2: Convert to fraction form
    101,318.70/151,978.17 = 26,438.79/x
  3. Step 3: Cross multiply
    101,318.70x = 151,978.17 × 26,438.79
  4. Step 4: Simplify right side
    101,318.70x = 4,018,118,921.21
  5. Step 5: Solve for x
    x = 4,018,118,921.21/101,318.70
  6. Step 6: Final answer
    x = 39,658.22

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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.