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Finding the Fourth Proportional to 77,963.30, 116,943.90 and 18,798.50

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Solution

The fourth proportional to 77,963.30, 116,943.90 and 18,798.50 is: 28,197.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,963.30 : 116,943.90 = 18,798.50 : x
  2. Step 2: Convert to fraction form
    77,963.30/116,943.90 = 18,798.50/x
  3. Step 3: Cross multiply
    77,963.30x = 116,943.90 × 18,798.50
  4. Step 4: Simplify right side
    77,963.30x = 2,198,369,319.43
  5. Step 5: Solve for x
    x = 2,198,369,319.43/77,963.30
  6. Step 6: Final answer
    x = 28,197.49

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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.