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Finding the Fourth Proportional to 415,421.82, 623,132.73 and 99,878.73

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Solution

The fourth proportional to 415,421.82, 623,132.73 and 99,878.73 is: 149,818.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,421.82 : 623,132.73 = 99,878.73 : x
  2. Step 2: Convert to fraction form
    415,421.82/623,132.73 = 99,878.73/x
  3. Step 3: Cross multiply
    415,421.82x = 623,132.73 × 99,878.73
  4. Step 4: Simplify right side
    415,421.82x = 62,237,705,693.83
  5. Step 5: Solve for x
    x = 62,237,705,693.83/415,421.82
  6. Step 6: Final answer
    x = 149,818.10

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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.