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Finding the Fourth Proportional to 75,639.40, 113,425.62 and 28,859.56

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Solution

The fourth proportional to 75,639.40, 113,425.62 and 28,859.56 is: 43,276.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,639.40 : 113,425.62 = 28,859.56 : x
  2. Step 2: Convert to fraction form
    75,639.40/113,425.62 = 28,859.56/x
  3. Step 3: Cross multiply
    75,639.40x = 113,425.62 × 28,859.56
  4. Step 4: Simplify right side
    75,639.40x = 3,273,413,485.93
  5. Step 5: Solve for x
    x = 3,273,413,485.93/75,639.40
  6. Step 6: Final answer
    x = 43,276.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.