Home / 100,112.72-138,157.37-57,097.16

Finding the Fourth Proportional to 100,112.72, 138,157.37 and 57,097.16

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Solution

The fourth proportional to 100,112.72, 138,157.37 and 57,097.16 is: 78,795.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,112.72 : 138,157.37 = 57,097.16 : x
  2. Step 2: Convert to fraction form
    100,112.72/138,157.37 = 57,097.16/x
  3. Step 3: Cross multiply
    100,112.72x = 138,157.37 × 57,097.16
  4. Step 4: Simplify right side
    100,112.72x = 7,888,392,483.80
  5. Step 5: Solve for x
    x = 7,888,392,483.80/100,112.72
  6. Step 6: Final answer
    x = 78,795.11

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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.