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Finding the Fourth Proportional to 221,710.60, 332,565.90 and 128,168.20

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Solution

The fourth proportional to 221,710.60, 332,565.90 and 128,168.20 is: 192,252.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,710.60 : 332,565.90 = 128,168.20 : x
  2. Step 2: Convert to fraction form
    221,710.60/332,565.90 = 128,168.20/x
  3. Step 3: Cross multiply
    221,710.60x = 332,565.90 × 128,168.20
  4. Step 4: Simplify right side
    221,710.60x = 42,624,372,784.38
  5. Step 5: Solve for x
    x = 42,624,372,784.38/221,710.60
  6. Step 6: Final answer
    x = 192,252.30

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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.