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Finding the Fourth Proportional to 79,438.40, 119,157.49 and 20,274.07

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Solution

The fourth proportional to 79,438.40, 119,157.49 and 20,274.07 is: 30,411.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,438.40 : 119,157.49 = 20,274.07 : x
  2. Step 2: Convert to fraction form
    79,438.40/119,157.49 = 20,274.07/x
  3. Step 3: Cross multiply
    79,438.40x = 119,157.49 × 20,274.07
  4. Step 4: Simplify right side
    79,438.40x = 2,415,807,293.28
  5. Step 5: Solve for x
    x = 2,415,807,293.28/79,438.40
  6. Step 6: Final answer
    x = 30,411.08

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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.