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Finding the Fourth Proportional to 71,074.32, 106,519.26 and 28,905.32

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Solution

The fourth proportional to 71,074.32, 106,519.26 and 28,905.32 is: 43,320.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,074.32 : 106,519.26 = 28,905.32 : x
  2. Step 2: Convert to fraction form
    71,074.32/106,519.26 = 28,905.32/x
  3. Step 3: Cross multiply
    71,074.32x = 106,519.26 × 28,905.32
  4. Step 4: Simplify right side
    71,074.32x = 3,078,973,296.46
  5. Step 5: Solve for x
    x = 3,078,973,296.46/71,074.32
  6. Step 6: Final answer
    x = 43,320.47

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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.