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Finding the Fourth Proportional to 60,990.84, 91,544.04 and 31,429.08

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Solution

The fourth proportional to 60,990.84, 91,544.04 and 31,429.08 is: 47,173.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,990.84 : 91,544.04 = 31,429.08 : x
  2. Step 2: Convert to fraction form
    60,990.84/91,544.04 = 31,429.08/x
  3. Step 3: Cross multiply
    60,990.84x = 91,544.04 × 31,429.08
  4. Step 4: Simplify right side
    60,990.84x = 2,877,144,956.68
  5. Step 5: Solve for x
    x = 2,877,144,956.68/60,990.84
  6. Step 6: Final answer
    x = 47,173.39

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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.