Home / 100,371.07-138,514.62-56,760.13

Finding the Fourth Proportional to 100,371.07, 138,514.62 and 56,760.13

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Solution

The fourth proportional to 100,371.07, 138,514.62 and 56,760.13 is: 78,330.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,371.07 : 138,514.62 = 56,760.13 : x
  2. Step 2: Convert to fraction form
    100,371.07/138,514.62 = 56,760.13/x
  3. Step 3: Cross multiply
    100,371.07x = 138,514.62 × 56,760.13
  4. Step 4: Simplify right side
    100,371.07x = 7,862,107,838.10
  5. Step 5: Solve for x
    x = 7,862,107,838.10/100,371.07
  6. Step 6: Final answer
    x = 78,330.42

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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.