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Finding the Fourth Proportional to 235,859.13, 325,485.36 and 128,429.91

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Solution

The fourth proportional to 235,859.13, 325,485.36 and 128,429.91 is: 177,233.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,859.13 : 325,485.36 = 128,429.91 : x
  2. Step 2: Convert to fraction form
    235,859.13/325,485.36 = 128,429.91/x
  3. Step 3: Cross multiply
    235,859.13x = 325,485.36 × 128,429.91
  4. Step 4: Simplify right side
    235,859.13x = 41,802,055,491.12
  5. Step 5: Solve for x
    x = 41,802,055,491.12/235,859.13
  6. Step 6: Final answer
    x = 177,233.15

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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.