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Finding the Fourth Proportional to 79,031.60, 109,063.62 and 43,221.68

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Solution

The fourth proportional to 79,031.60, 109,063.62 and 43,221.68 is: 59,645.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,031.60 : 109,063.62 = 43,221.68 : x
  2. Step 2: Convert to fraction form
    79,031.60/109,063.62 = 43,221.68/x
  3. Step 3: Cross multiply
    79,031.60x = 109,063.62 × 43,221.68
  4. Step 4: Simplify right side
    79,031.60x = 4,713,912,883.28
  5. Step 5: Solve for x
    x = 4,713,912,883.28/79,031.60
  6. Step 6: Final answer
    x = 59,645.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.