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Finding the Fourth Proportional to 53,310.68, 79,939.02 and 31,129.64

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Solution

The fourth proportional to 53,310.68, 79,939.02 and 31,129.64 is: 46,678.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,310.68 : 79,939.02 = 31,129.64 : x
  2. Step 2: Convert to fraction form
    53,310.68/79,939.02 = 31,129.64/x
  3. Step 3: Cross multiply
    53,310.68x = 79,939.02 × 31,129.64
  4. Step 4: Simplify right side
    53,310.68x = 2,488,472,914.55
  5. Step 5: Solve for x
    x = 2,488,472,914.55/53,310.68
  6. Step 6: Final answer
    x = 46,678.69

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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.