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Finding the Fourth Proportional to 71,170.50, 106,774.32 and 21,250.60

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Solution

The fourth proportional to 71,170.50, 106,774.32 and 21,250.60 is: 31,881.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,170.50 : 106,774.32 = 21,250.60 : x
  2. Step 2: Convert to fraction form
    71,170.50/106,774.32 = 21,250.60/x
  3. Step 3: Cross multiply
    71,170.50x = 106,774.32 × 21,250.60
  4. Step 4: Simplify right side
    71,170.50x = 2,269,018,364.59
  5. Step 5: Solve for x
    x = 2,269,018,364.59/71,170.50
  6. Step 6: Final answer
    x = 31,881.44

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1.5x scale

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.