Home / 100,693.23-138,956.66-55,374.28

Finding the Fourth Proportional to 100,693.23, 138,956.66 and 55,374.28

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Solution

The fourth proportional to 100,693.23, 138,956.66 and 55,374.28 is: 76,416.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,693.23 : 138,956.66 = 55,374.28 : x
  2. Step 2: Convert to fraction form
    100,693.23/138,956.66 = 55,374.28/x
  3. Step 3: Cross multiply
    100,693.23x = 138,956.66 × 55,374.28
  4. Step 4: Simplify right side
    100,693.23x = 7,694,625,675.21
  5. Step 5: Solve for x
    x = 7,694,625,675.21/100,693.23
  6. Step 6: Final answer
    x = 76,416.52

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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.