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Finding the Fourth Proportional to 71,346.20, 107,019.30 and 47,845.40

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Solution

The fourth proportional to 71,346.20, 107,019.30 and 47,845.40 is: 71,768.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,346.20 : 107,019.30 = 47,845.40 : x
  2. Step 2: Convert to fraction form
    71,346.20/107,019.30 = 47,845.40/x
  3. Step 3: Cross multiply
    71,346.20x = 107,019.30 × 47,845.40
  4. Step 4: Simplify right side
    71,346.20x = 5,120,381,216.22
  5. Step 5: Solve for x
    x = 5,120,381,216.22/71,346.20
  6. Step 6: Final answer
    x = 71,768.10

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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.