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Finding the Fourth Proportional to 84,675.51, 126,968.31 and 28,496.88

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Solution

The fourth proportional to 84,675.51, 126,968.31 and 28,496.88 is: 42,730.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,675.51 : 126,968.31 = 28,496.88 : x
  2. Step 2: Convert to fraction form
    84,675.51/126,968.31 = 28,496.88/x
  3. Step 3: Cross multiply
    84,675.51x = 126,968.31 × 28,496.88
  4. Step 4: Simplify right side
    84,675.51x = 3,618,200,693.87
  5. Step 5: Solve for x
    x = 3,618,200,693.87/84,675.51
  6. Step 6: Final answer
    x = 42,730.19

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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.