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Finding the Fourth Proportional to 71,131.70, 106,697.55 and 21,246.84

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Solution

The fourth proportional to 71,131.70, 106,697.55 and 21,246.84 is: 31,870.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,131.70 : 106,697.55 = 21,246.84 : x
  2. Step 2: Convert to fraction form
    71,131.70/106,697.55 = 21,246.84/x
  3. Step 3: Cross multiply
    71,131.70x = 106,697.55 × 21,246.84
  4. Step 4: Simplify right side
    71,131.70x = 2,266,985,773.24
  5. Step 5: Solve for x
    x = 2,266,985,773.24/71,131.70
  6. Step 6: Final answer
    x = 31,870.26

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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.