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Finding the Fourth Proportional to 84,718.72, 126,828.42 and 74,209.30

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Solution

The fourth proportional to 84,718.72, 126,828.42 and 74,209.30 is: 111,095.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,718.72 : 126,828.42 = 74,209.30 : x
  2. Step 2: Convert to fraction form
    84,718.72/126,828.42 = 74,209.30/x
  3. Step 3: Cross multiply
    84,718.72x = 126,828.42 × 74,209.30
  4. Step 4: Simplify right side
    84,718.72x = 9,411,848,268.31
  5. Step 5: Solve for x
    x = 9,411,848,268.31/84,718.72
  6. Step 6: Final answer
    x = 111,095.26

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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.