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Finding the Fourth Proportional to 160,698.65, 221,750.20 and 91,787.78

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Solution

The fourth proportional to 160,698.65, 221,750.20 and 91,787.78 is: 126,659.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,698.65 : 221,750.20 = 91,787.78 : x
  2. Step 2: Convert to fraction form
    160,698.65/221,750.20 = 91,787.78/x
  3. Step 3: Cross multiply
    160,698.65x = 221,750.20 × 91,787.78
  4. Step 4: Simplify right side
    160,698.65x = 20,353,957,234.34
  5. Step 5: Solve for x
    x = 20,353,957,234.34/160,698.65
  6. Step 6: Final answer
    x = 126,659.17

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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.