Home / 142,909.20-197,226.81-79,267.50

Finding the Fourth Proportional to 142,909.20, 197,226.81 and 79,267.50

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Solution

The fourth proportional to 142,909.20, 197,226.81 and 79,267.50 is: 109,395.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,909.20 : 197,226.81 = 79,267.50 : x
  2. Step 2: Convert to fraction form
    142,909.20/197,226.81 = 79,267.50/x
  3. Step 3: Cross multiply
    142,909.20x = 197,226.81 × 79,267.50
  4. Step 4: Simplify right side
    142,909.20x = 15,633,676,161.68
  5. Step 5: Solve for x
    x = 15,633,676,161.68/142,909.20
  6. Step 6: Final answer
    x = 109,395.87

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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.