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Finding the Fourth Proportional to 127,989, 176,624.82 and 71,400.36

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Solution

The fourth proportional to 127,989, 176,624.82 and 71,400.36 is: 98,532.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,989 : 176,624.82 = 71,400.36 : x
  2. Step 2: Convert to fraction form
    127,989/176,624.82 = 71,400.36/x
  3. Step 3: Cross multiply
    127,989x = 176,624.82 × 71,400.36
  4. Step 4: Simplify right side
    127,989x = 12,611,075,732.94
  5. Step 5: Solve for x
    x = 12,611,075,732.94/127,989
  6. Step 6: Final answer
    x = 98,532.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.