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Finding the Fourth Proportional to 79,686.81, 109,968.21 and 45,696.58

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Solution

The fourth proportional to 79,686.81, 109,968.21 and 45,696.58 is: 63,061.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,686.81 : 109,968.21 = 45,696.58 : x
  2. Step 2: Convert to fraction form
    79,686.81/109,968.21 = 45,696.58/x
  3. Step 3: Cross multiply
    79,686.81x = 109,968.21 × 45,696.58
  4. Step 4: Simplify right side
    79,686.81x = 5,025,170,830.80
  5. Step 5: Solve for x
    x = 5,025,170,830.80/79,686.81
  6. Step 6: Final answer
    x = 63,061.51

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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.