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Finding the Fourth Proportional to 57,749, 79,693.66 and 31,253

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Solution

The fourth proportional to 57,749, 79,693.66 and 31,253 is: 43,129.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,749 : 79,693.66 = 31,253 : x
  2. Step 2: Convert to fraction form
    57,749/79,693.66 = 31,253/x
  3. Step 3: Cross multiply
    57,749x = 79,693.66 × 31,253
  4. Step 4: Simplify right side
    57,749x = 2,490,665,955.98
  5. Step 5: Solve for x
    x = 2,490,665,955.98/57,749
  6. Step 6: Final answer
    x = 43,129.16

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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.