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Finding the Fourth Proportional to 79,963.26, 110,358.63 and 66,510.78

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Solution

The fourth proportional to 79,963.26, 110,358.63 and 66,510.78 is: 91,792.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,963.26 : 110,358.63 = 66,510.78 : x
  2. Step 2: Convert to fraction form
    79,963.26/110,358.63 = 66,510.78/x
  3. Step 3: Cross multiply
    79,963.26x = 110,358.63 × 66,510.78
  4. Step 4: Simplify right side
    79,963.26x = 7,340,038,561.03
  5. Step 5: Solve for x
    x = 7,340,038,561.03/79,963.26
  6. Step 6: Final answer
    x = 91,792.64

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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.