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Finding the Fourth Proportional to 57,276, 79,000.56 and 49,707.36

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Solution

The fourth proportional to 57,276, 79,000.56 and 49,707.36 is: 68,561.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,276 : 79,000.56 = 49,707.36 : x
  2. Step 2: Convert to fraction form
    57,276/79,000.56 = 49,707.36/x
  3. Step 3: Cross multiply
    57,276x = 79,000.56 × 49,707.36
  4. Step 4: Simplify right side
    57,276x = 3,926,909,276.12
  5. Step 5: Solve for x
    x = 3,926,909,276.12/57,276
  6. Step 6: Final answer
    x = 68,561.16

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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.