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Finding the Fourth Proportional to 127,989, 176,629.62 and 71,411.28

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Solution

The fourth proportional to 127,989, 176,629.62 and 71,411.28 is: 98,550.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,989 : 176,629.62 = 71,411.28 : x
  2. Step 2: Convert to fraction form
    127,989/176,629.62 = 71,411.28/x
  3. Step 3: Cross multiply
    127,989x = 176,629.62 × 71,411.28
  4. Step 4: Simplify right side
    127,989x = 12,613,347,250.11
  5. Step 5: Solve for x
    x = 12,613,347,250.11/127,989
  6. Step 6: Final answer
    x = 98,550.24

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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.