Home / 103,218.25-154,625.64-71,121.53

Finding the Fourth Proportional to 103,218.25, 154,625.64 and 71,121.53

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Solution

The fourth proportional to 103,218.25, 154,625.64 and 71,121.53 is: 106,543.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,218.25 : 154,625.64 = 71,121.53 : x
  2. Step 2: Convert to fraction form
    103,218.25/154,625.64 = 71,121.53/x
  3. Step 3: Cross multiply
    103,218.25x = 154,625.64 × 71,121.53
  4. Step 4: Simplify right side
    103,218.25x = 10,997,212,094.03
  5. Step 5: Solve for x
    x = 10,997,212,094.03/103,218.25
  6. Step 6: Final answer
    x = 106,543.29

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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.