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Finding the Fourth Proportional to 266,421.76, 399,790.25 and 98,060.33

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Solution

The fourth proportional to 266,421.76, 399,790.25 and 98,060.33 is: 147,148.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,421.76 : 399,790.25 = 98,060.33 : x
  2. Step 2: Convert to fraction form
    266,421.76/399,790.25 = 98,060.33/x
  3. Step 3: Cross multiply
    266,421.76x = 399,790.25 × 98,060.33
  4. Step 4: Simplify right side
    266,421.76x = 39,203,563,845.78
  5. Step 5: Solve for x
    x = 39,203,563,845.78/266,421.76
  6. Step 6: Final answer
    x = 147,148.51

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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.