Home / 220,418.13-304,180.29-128,534.86

Finding the Fourth Proportional to 220,418.13, 304,180.29 and 128,534.86

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Solution

The fourth proportional to 220,418.13, 304,180.29 and 128,534.86 is: 177,380.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,418.13 : 304,180.29 = 128,534.86 : x
  2. Step 2: Convert to fraction form
    220,418.13/304,180.29 = 128,534.86/x
  3. Step 3: Cross multiply
    220,418.13x = 304,180.29 × 128,534.86
  4. Step 4: Simplify right side
    220,418.13x = 39,097,771,370.13
  5. Step 5: Solve for x
    x = 39,097,771,370.13/220,418.13
  6. Step 6: Final answer
    x = 177,380.01

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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.