Home / 100,170.96-138,239.65-57,157.46

Finding the Fourth Proportional to 100,170.96, 138,239.65 and 57,157.46

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Solution

The fourth proportional to 100,170.96, 138,239.65 and 57,157.46 is: 78,879.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,170.96 : 138,239.65 = 57,157.46 : x
  2. Step 2: Convert to fraction form
    100,170.96/138,239.65 = 57,157.46/x
  3. Step 3: Cross multiply
    100,170.96x = 138,239.65 × 57,157.46
  4. Step 4: Simplify right side
    100,170.96x = 7,901,426,574.09
  5. Step 5: Solve for x
    x = 7,901,426,574.09/100,170.96
  6. Step 6: Final answer
    x = 78,879.41

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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.