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Finding the Fourth Proportional to 79,500.80, 109,709.10 and 43,200.64

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Solution

The fourth proportional to 79,500.80, 109,709.10 and 43,200.64 is: 59,615.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,500.80 : 109,709.10 = 43,200.64 : x
  2. Step 2: Convert to fraction form
    79,500.80/109,709.10 = 43,200.64/x
  3. Step 3: Cross multiply
    79,500.80x = 109,709.10 × 43,200.64
  4. Step 4: Simplify right side
    79,500.80x = 4,739,503,333.82
  5. Step 5: Solve for x
    x = 4,739,503,333.82/79,500.80
  6. Step 6: Final answer
    x = 59,615.79

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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.