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Finding the Fourth Proportional to 67,111.76, 100,619.64 and 31,553.20

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Solution

The fourth proportional to 67,111.76, 100,619.64 and 31,553.20 is: 47,307.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,111.76 : 100,619.64 = 31,553.20 : x
  2. Step 2: Convert to fraction form
    67,111.76/100,619.64 = 31,553.20/x
  3. Step 3: Cross multiply
    67,111.76x = 100,619.64 × 31,553.20
  4. Step 4: Simplify right side
    67,111.76x = 3,174,871,624.85
  5. Step 5: Solve for x
    x = 3,174,871,624.85/67,111.76
  6. Step 6: Final answer
    x = 47,307.23

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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.