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Finding the Fourth Proportional to 186,172.76, 279,166.84 and 66,211.72

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Solution

The fourth proportional to 186,172.76, 279,166.84 and 66,211.72 is: 99,284.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,172.76 : 279,166.84 = 66,211.72 : x
  2. Step 2: Convert to fraction form
    186,172.76/279,166.84 = 66,211.72/x
  3. Step 3: Cross multiply
    186,172.76x = 279,166.84 × 66,211.72
  4. Step 4: Simplify right side
    186,172.76x = 18,484,116,643.36
  5. Step 5: Solve for x
    x = 18,484,116,643.36/186,172.76
  6. Step 6: Final answer
    x = 99,284.75

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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.