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Finding the Fourth Proportional to 235,808.82, 325,415.95 and 128,378.86

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Solution

The fourth proportional to 235,808.82, 325,415.95 and 128,378.86 is: 177,162.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,808.82 : 325,415.95 = 128,378.86 : x
  2. Step 2: Convert to fraction form
    235,808.82/325,415.95 = 128,378.86/x
  3. Step 3: Cross multiply
    235,808.82x = 325,415.95 × 128,378.86
  4. Step 4: Simplify right side
    235,808.82x = 41,776,527,552.33
  5. Step 5: Solve for x
    x = 41,776,527,552.33/235,808.82
  6. Step 6: Final answer
    x = 177,162.70

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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.