Home / 100,247.39-138,345.98-57,238.52

Finding the Fourth Proportional to 100,247.39, 138,345.98 and 57,238.52

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Solution

The fourth proportional to 100,247.39, 138,345.98 and 57,238.52 is: 78,991.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,247.39 : 138,345.98 = 57,238.52 : x
  2. Step 2: Convert to fraction form
    100,247.39/138,345.98 = 57,238.52/x
  3. Step 3: Cross multiply
    100,247.39x = 138,345.98 × 57,238.52
  4. Step 4: Simplify right side
    100,247.39x = 7,918,718,165.23
  5. Step 5: Solve for x
    x = 7,918,718,165.23/100,247.39
  6. Step 6: Final answer
    x = 78,991.76

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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.