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Finding the Fourth Proportional to 50,979.94, 70,349.94 and 28,320.40

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Solution

The fourth proportional to 50,979.94, 70,349.94 and 28,320.40 is: 39,080.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,979.94 : 70,349.94 = 28,320.40 : x
  2. Step 2: Convert to fraction form
    50,979.94/70,349.94 = 28,320.40/x
  3. Step 3: Cross multiply
    50,979.94x = 70,349.94 × 28,320.40
  4. Step 4: Simplify right side
    50,979.94x = 1,992,338,440.78
  5. Step 5: Solve for x
    x = 1,992,338,440.78/50,979.94
  6. Step 6: Final answer
    x = 39,080.83

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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.