Home / 75,121.83-103,611.56-66,133.26

Finding the Fourth Proportional to 75,121.83, 103,611.56 and 66,133.26

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Solution

The fourth proportional to 75,121.83, 103,611.56 and 66,133.26 is: 91,214.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,121.83 : 103,611.56 = 66,133.26 : x
  2. Step 2: Convert to fraction form
    75,121.83/103,611.56 = 66,133.26/x
  3. Step 3: Cross multiply
    75,121.83x = 103,611.56 × 66,133.26
  4. Step 4: Simplify right side
    75,121.83x = 6,852,169,905.82
  5. Step 5: Solve for x
    x = 6,852,169,905.82/75,121.83
  6. Step 6: Final answer
    x = 91,214.10

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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.