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Finding the Fourth Proportional to 70,809.59, 106,238.99 and 31,394.39

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Solution

The fourth proportional to 70,809.59, 106,238.99 and 31,394.39 is: 47,102.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,809.59 : 106,238.99 = 31,394.39 : x
  2. Step 2: Convert to fraction form
    70,809.59/106,238.99 = 31,394.39/x
  3. Step 3: Cross multiply
    70,809.59x = 106,238.99 × 31,394.39
  4. Step 4: Simplify right side
    70,809.59x = 3,335,307,832.56
  5. Step 5: Solve for x
    x = 3,335,307,832.56/70,809.59
  6. Step 6: Final answer
    x = 47,102.49

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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.