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Finding the Fourth Proportional to 235,553.80, 325,069.59 and 128,129.58

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Solution

The fourth proportional to 235,553.80, 325,069.59 and 128,129.58 is: 176,821.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,553.80 : 325,069.59 = 128,129.58 : x
  2. Step 2: Convert to fraction form
    235,553.80/325,069.59 = 128,129.58/x
  3. Step 3: Cross multiply
    235,553.80x = 325,069.59 × 128,129.58
  4. Step 4: Simplify right side
    235,553.80x = 41,651,028,412.12
  5. Step 5: Solve for x
    x = 41,651,028,412.12/235,553.80
  6. Step 6: Final answer
    x = 176,821.72

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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.