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Finding the Fourth Proportional to 71,120.10, 106,679.49 and 28,990.32

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Solution

The fourth proportional to 71,120.10, 106,679.49 and 28,990.32 is: 43,485.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,120.10 : 106,679.49 = 28,990.32 : x
  2. Step 2: Convert to fraction form
    71,120.10/106,679.49 = 28,990.32/x
  3. Step 3: Cross multiply
    71,120.10x = 106,679.49 × 28,990.32
  4. Step 4: Simplify right side
    71,120.10x = 3,092,672,552.54
  5. Step 5: Solve for x
    x = 3,092,672,552.54/71,120.10
  6. Step 6: Final answer
    x = 43,485.21

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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.