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Finding the Fourth Proportional to 235,561.28, 325,083.18 and 134,978.72

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Solution

The fourth proportional to 235,561.28, 325,083.18 and 134,978.72 is: 186,275.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,561.28 : 325,083.18 = 134,978.72 : x
  2. Step 2: Convert to fraction form
    235,561.28/325,083.18 = 134,978.72/x
  3. Step 3: Cross multiply
    235,561.28x = 325,083.18 × 134,978.72
  4. Step 4: Simplify right side
    235,561.28x = 43,879,311,529.93
  5. Step 5: Solve for x
    x = 43,879,311,529.93/235,561.28
  6. Step 6: Final answer
    x = 186,275.57

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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.