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Finding the Fourth Proportional to 100,717.65, 151,076.45 and 47,376.45

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Solution

The fourth proportional to 100,717.65, 151,076.45 and 47,376.45 is: 71,064.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,717.65 : 151,076.45 = 47,376.45 : x
  2. Step 2: Convert to fraction form
    100,717.65/151,076.45 = 47,376.45/x
  3. Step 3: Cross multiply
    100,717.65x = 151,076.45 × 47,376.45
  4. Step 4: Simplify right side
    100,717.65x = 7,157,465,642.72
  5. Step 5: Solve for x
    x = 7,157,465,642.72/100,717.65
  6. Step 6: Final answer
    x = 71,064.66

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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.