Home / 100,690.16-138,954.67-55,365.26

Finding the Fourth Proportional to 100,690.16, 138,954.67 and 55,365.26

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Solution

The fourth proportional to 100,690.16, 138,954.67 and 55,365.26 is: 76,405.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,690.16 : 138,954.67 = 55,365.26 : x
  2. Step 2: Convert to fraction form
    100,690.16/138,954.67 = 55,365.26/x
  3. Step 3: Cross multiply
    100,690.16x = 138,954.67 × 55,365.26
  4. Step 4: Simplify right side
    100,690.16x = 7,693,260,599.58
  5. Step 5: Solve for x
    x = 7,693,260,599.58/100,690.16
  6. Step 6: Final answer
    x = 76,405.29

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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.