Home / 521,106.30-781,659.45-166,156.20

Finding the Fourth Proportional to 521,106.30, 781,659.45 and 166,156.20

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Solution

The fourth proportional to 521,106.30, 781,659.45 and 166,156.20 is: 249,234.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,106.30 : 781,659.45 = 166,156.20 : x
  2. Step 2: Convert to fraction form
    521,106.30/781,659.45 = 166,156.20/x
  3. Step 3: Cross multiply
    521,106.30x = 781,659.45 × 166,156.20
  4. Step 4: Simplify right side
    521,106.30x = 129,877,563,906.09
  5. Step 5: Solve for x
    x = 129,877,563,906.09/521,106.30
  6. Step 6: Final answer
    x = 249,234.30

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Double scale
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Similar ratio
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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.