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Finding the Fourth Proportional to 79,438.71, 119,157.96 and 20,274.38

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Solution

The fourth proportional to 79,438.71, 119,157.96 and 20,274.38 is: 30,411.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,438.71 : 119,157.96 = 20,274.38 : x
  2. Step 2: Convert to fraction form
    79,438.71/119,157.96 = 20,274.38/x
  3. Step 3: Cross multiply
    79,438.71x = 119,157.96 × 20,274.38
  4. Step 4: Simplify right side
    79,438.71x = 2,415,853,574.10
  5. Step 5: Solve for x
    x = 2,415,853,574.10/79,438.71
  6. Step 6: Final answer
    x = 30,411.54

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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.