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Finding the Fourth Proportional to 80,293.76, 110,931.36 and 55,276.64

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Solution

The fourth proportional to 80,293.76, 110,931.36 and 55,276.64 is: 76,368.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,293.76 : 110,931.36 = 55,276.64 : x
  2. Step 2: Convert to fraction form
    80,293.76/110,931.36 = 55,276.64/x
  3. Step 3: Cross multiply
    80,293.76x = 110,931.36 × 55,276.64
  4. Step 4: Simplify right side
    80,293.76x = 6,131,912,851.43
  5. Step 5: Solve for x
    x = 6,131,912,851.43/80,293.76
  6. Step 6: Final answer
    x = 76,368.49

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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.