Home / 71,111.45-106,667.15-21,190.28

Finding the Fourth Proportional to 71,111.45, 106,667.15 and 21,190.28

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Solution

The fourth proportional to 71,111.45, 106,667.15 and 21,190.28 is: 31,785.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,111.45 : 106,667.15 = 21,190.28 : x
  2. Step 2: Convert to fraction form
    71,111.45/106,667.15 = 21,190.28/x
  3. Step 3: Cross multiply
    71,111.45x = 106,667.15 × 21,190.28
  4. Step 4: Simplify right side
    71,111.45x = 2,260,306,136.01
  5. Step 5: Solve for x
    x = 2,260,306,136.01/71,111.45
  6. Step 6: Final answer
    x = 31,785.40

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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.