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Finding the Fourth Proportional to 51,963.60, 77,945.40 and 51,272.40

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Solution

The fourth proportional to 51,963.60, 77,945.40 and 51,272.40 is: 76,908.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,963.60 : 77,945.40 = 51,272.40 : x
  2. Step 2: Convert to fraction form
    51,963.60/77,945.40 = 51,272.40/x
  3. Step 3: Cross multiply
    51,963.60x = 77,945.40 × 51,272.40
  4. Step 4: Simplify right side
    51,963.60x = 3,996,447,726.96
  5. Step 5: Solve for x
    x = 3,996,447,726.96/51,963.60
  6. Step 6: Final answer
    x = 76,908.60

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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.