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Finding the Fourth Proportional to 171,113.80, 256,281.90 and 108,128.20

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Solution

The fourth proportional to 171,113.80, 256,281.90 and 108,128.20 is: 161,946.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,113.80 : 256,281.90 = 108,128.20 : x
  2. Step 2: Convert to fraction form
    171,113.80/256,281.90 = 108,128.20/x
  3. Step 3: Cross multiply
    171,113.80x = 256,281.90 × 108,128.20
  4. Step 4: Simplify right side
    171,113.80x = 27,711,300,539.58
  5. Step 5: Solve for x
    x = 27,711,300,539.58/171,113.80
  6. Step 6: Final answer
    x = 161,946.61

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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.