Home / 100,377.30-138,172.94-86,759.10

Finding the Fourth Proportional to 100,377.30, 138,172.94 and 86,759.10

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Solution

The fourth proportional to 100,377.30, 138,172.94 and 86,759.10 is: 119,427.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,377.30 : 138,172.94 = 86,759.10 : x
  2. Step 2: Convert to fraction form
    100,377.30/138,172.94 = 86,759.10/x
  3. Step 3: Cross multiply
    100,377.30x = 138,172.94 × 86,759.10
  4. Step 4: Simplify right side
    100,377.30x = 11,987,759,918.75
  5. Step 5: Solve for x
    x = 11,987,759,918.75/100,377.30
  6. Step 6: Final answer
    x = 119,427.00

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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.