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Finding the Fourth Proportional to 84,710.71, 126,816.42 and 74,201.29

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Solution

The fourth proportional to 84,710.71, 126,816.42 and 74,201.29 is: 111,083.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,710.71 : 126,816.42 = 74,201.29 : x
  2. Step 2: Convert to fraction form
    84,710.71/126,816.42 = 74,201.29/x
  3. Step 3: Cross multiply
    84,710.71x = 126,816.42 × 74,201.29
  4. Step 4: Simplify right side
    84,710.71x = 9,409,941,957.18
  5. Step 5: Solve for x
    x = 9,409,941,957.18/84,710.71
  6. Step 6: Final answer
    x = 111,083.26

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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.