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Finding the Fourth Proportional to 79,478.72, 109,777.68 and 59,424.68

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Solution

The fourth proportional to 79,478.72, 109,777.68 and 59,424.68 is: 82,078.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,478.72 : 109,777.68 = 59,424.68 : x
  2. Step 2: Convert to fraction form
    79,478.72/109,777.68 = 59,424.68/x
  3. Step 3: Cross multiply
    79,478.72x = 109,777.68 × 59,424.68
  4. Step 4: Simplify right side
    79,478.72x = 6,523,503,505.14
  5. Step 5: Solve for x
    x = 6,523,503,505.14/79,478.72
  6. Step 6: Final answer
    x = 82,078.62

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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.