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Finding the Fourth Proportional to 79,438.77, 119,158.05 and 20,274.45

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Solution

The fourth proportional to 79,438.77, 119,158.05 and 20,274.45 is: 30,411.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,438.77 : 119,158.05 = 20,274.45 : x
  2. Step 2: Convert to fraction form
    79,438.77/119,158.05 = 20,274.45/x
  3. Step 3: Cross multiply
    79,438.77x = 119,158.05 × 20,274.45
  4. Step 4: Simplify right side
    79,438.77x = 2,415,863,331.03
  5. Step 5: Solve for x
    x = 2,415,863,331.03/79,438.77
  6. Step 6: Final answer
    x = 30,411.64

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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.