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Finding the Fourth Proportional to 99,790.53, 149,721.21 and 62,307.15

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Solution

The fourth proportional to 99,790.53, 149,721.21 and 62,307.15 is: 93,482.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,790.53 : 149,721.21 = 62,307.15 : x
  2. Step 2: Convert to fraction form
    99,790.53/149,721.21 = 62,307.15/x
  3. Step 3: Cross multiply
    99,790.53x = 149,721.21 × 62,307.15
  4. Step 4: Simplify right side
    99,790.53x = 9,328,701,889.65
  5. Step 5: Solve for x
    x = 9,328,701,889.65/99,790.53
  6. Step 6: Final answer
    x = 93,482.84

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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.