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Finding the Fourth Proportional to 71,490.36, 107,241.48 and 18,900.30

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Solution

The fourth proportional to 71,490.36, 107,241.48 and 18,900.30 is: 28,352.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,490.36 : 107,241.48 = 18,900.30 : x
  2. Step 2: Convert to fraction form
    71,490.36/107,241.48 = 18,900.30/x
  3. Step 3: Cross multiply
    71,490.36x = 107,241.48 × 18,900.30
  4. Step 4: Simplify right side
    71,490.36x = 2,026,896,144.44
  5. Step 5: Solve for x
    x = 2,026,896,144.44/71,490.36
  6. Step 6: Final answer
    x = 28,352.02

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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.