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Finding the Fourth Proportional to 157,049.90, 235,315.65 and 133,721.90

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Solution

The fourth proportional to 157,049.90, 235,315.65 and 133,721.90 is: 200,362.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,049.90 : 235,315.65 = 133,721.90 : x
  2. Step 2: Convert to fraction form
    157,049.90/235,315.65 = 133,721.90/x
  3. Step 3: Cross multiply
    157,049.90x = 235,315.65 × 133,721.90
  4. Step 4: Simplify right side
    157,049.90x = 31,466,855,817.74
  5. Step 5: Solve for x
    x = 31,466,855,817.74/157,049.90
  6. Step 6: Final answer
    x = 200,362.15

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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.