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Finding the Fourth Proportional to 71,039.20, 106,520.40 and 29,490.40

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Solution

The fourth proportional to 71,039.20, 106,520.40 and 29,490.40 is: 44,219.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,039.20 : 106,520.40 = 29,490.40 : x
  2. Step 2: Convert to fraction form
    71,039.20/106,520.40 = 29,490.40/x
  3. Step 3: Cross multiply
    71,039.20x = 106,520.40 × 29,490.40
  4. Step 4: Simplify right side
    71,039.20x = 3,141,329,204.16
  5. Step 5: Solve for x
    x = 3,141,329,204.16/71,039.20
  6. Step 6: Final answer
    x = 44,219.66

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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.