Home / 221,247.07-305,320.40-120,645.07

Finding the Fourth Proportional to 221,247.07, 305,320.40 and 120,645.07

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Solution

The fourth proportional to 221,247.07, 305,320.40 and 120,645.07 is: 166,489.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,247.07 : 305,320.40 = 120,645.07 : x
  2. Step 2: Convert to fraction form
    221,247.07/305,320.40 = 120,645.07/x
  3. Step 3: Cross multiply
    221,247.07x = 305,320.40 × 120,645.07
  4. Step 4: Simplify right side
    221,247.07x = 36,835,400,427.20
  5. Step 5: Solve for x
    x = 36,835,400,427.20/221,247.07
  6. Step 6: Final answer
    x = 166,489.89

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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.