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Finding the Fourth Proportional to 221,267.70, 305,397.79 and 140,679.50

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Solution

The fourth proportional to 221,267.70, 305,397.79 and 140,679.50 is: 194,168.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,267.70 : 305,397.79 = 140,679.50 : x
  2. Step 2: Convert to fraction form
    221,267.70/305,397.79 = 140,679.50/x
  3. Step 3: Cross multiply
    221,267.70x = 305,397.79 × 140,679.50
  4. Step 4: Simplify right side
    221,267.70x = 42,963,206,519.62
  5. Step 5: Solve for x
    x = 42,963,206,519.62/221,267.70
  6. Step 6: Final answer
    x = 194,168.45

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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.