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Finding the Fourth Proportional to 101,887.90, 152,633.03 and 66,720.94

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Solution

The fourth proportional to 101,887.90, 152,633.03 and 66,720.94 is: 99,951.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,887.90 : 152,633.03 = 66,720.94 : x
  2. Step 2: Convert to fraction form
    101,887.90/152,633.03 = 66,720.94/x
  3. Step 3: Cross multiply
    101,887.90x = 152,633.03 × 66,720.94
  4. Step 4: Simplify right side
    101,887.90x = 10,183,818,521.46
  5. Step 5: Solve for x
    x = 10,183,818,521.46/101,887.90
  6. Step 6: Final answer
    x = 99,951.21

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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.