Home / 100,112.73-138,171.08-57,092.31

Finding the Fourth Proportional to 100,112.73, 138,171.08 and 57,092.31

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Solution

The fourth proportional to 100,112.73, 138,171.08 and 57,092.31 is: 78,796.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,112.73 : 138,171.08 = 57,092.31 : x
  2. Step 2: Convert to fraction form
    100,112.73/138,171.08 = 57,092.31/x
  3. Step 3: Cross multiply
    100,112.73x = 138,171.08 × 57,092.31
  4. Step 4: Simplify right side
    100,112.73x = 7,888,506,275.13
  5. Step 5: Solve for x
    x = 7,888,506,275.13/100,112.73
  6. Step 6: Final answer
    x = 78,796.24

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1.5x scale

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.