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Finding the Fourth Proportional to 116,771.98, 175,215.21 and 72,386.98

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Solution

The fourth proportional to 116,771.98, 175,215.21 and 72,386.98 is: 108,615.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,771.98 : 175,215.21 = 72,386.98 : x
  2. Step 2: Convert to fraction form
    116,771.98/175,215.21 = 72,386.98/x
  3. Step 3: Cross multiply
    116,771.98x = 175,215.21 × 72,386.98
  4. Step 4: Simplify right side
    116,771.98x = 12,683,299,901.97
  5. Step 5: Solve for x
    x = 12,683,299,901.97/116,771.98
  6. Step 6: Final answer
    x = 108,615.95

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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.