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Finding the Fourth Proportional to 235,965.72, 325,622.72 and 128,536.64

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Solution

The fourth proportional to 235,965.72, 325,622.72 and 128,536.64 is: 177,375.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,965.72 : 325,622.72 = 128,536.64 : x
  2. Step 2: Convert to fraction form
    235,965.72/325,622.72 = 128,536.64/x
  3. Step 3: Cross multiply
    235,965.72x = 325,622.72 × 128,536.64
  4. Step 4: Simplify right side
    235,965.72x = 41,854,448,065.66
  5. Step 5: Solve for x
    x = 41,854,448,065.66/235,965.72
  6. Step 6: Final answer
    x = 177,375.12

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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.