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Finding the Fourth Proportional to 208,060.66, 312,017.18 and 74,905.16

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Solution

The fourth proportional to 208,060.66, 312,017.18 and 74,905.16 is: 112,331.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,060.66 : 312,017.18 = 74,905.16 : x
  2. Step 2: Convert to fraction form
    208,060.66/312,017.18 = 74,905.16/x
  3. Step 3: Cross multiply
    208,060.66x = 312,017.18 × 74,905.16
  4. Step 4: Simplify right side
    208,060.66x = 23,371,696,790.65
  5. Step 5: Solve for x
    x = 23,371,696,790.65/208,060.66
  6. Step 6: Final answer
    x = 112,331.17

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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.