Home / 121,215.78-181,852.26-38,109.78

Finding the Fourth Proportional to 121,215.78, 181,852.26 and 38,109.78

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Solution

The fourth proportional to 121,215.78, 181,852.26 and 38,109.78 is: 57,173.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,215.78 : 181,852.26 = 38,109.78 : x
  2. Step 2: Convert to fraction form
    121,215.78/181,852.26 = 38,109.78/x
  3. Step 3: Cross multiply
    121,215.78x = 181,852.26 × 38,109.78
  4. Step 4: Simplify right side
    121,215.78x = 6,930,349,621.10
  5. Step 5: Solve for x
    x = 6,930,349,621.10/121,215.78
  6. Step 6: Final answer
    x = 57,173.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.