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Finding the Fourth Proportional to 101,391.80, 139,915.02 and 56,067.04

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Solution

The fourth proportional to 101,391.80, 139,915.02 and 56,067.04 is: 77,369.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,391.80 : 139,915.02 = 56,067.04 : x
  2. Step 2: Convert to fraction form
    101,391.80/139,915.02 = 56,067.04/x
  3. Step 3: Cross multiply
    101,391.80x = 139,915.02 × 56,067.04
  4. Step 4: Simplify right side
    101,391.80x = 7,844,621,022.94
  5. Step 5: Solve for x
    x = 7,844,621,022.94/101,391.80
  6. Step 6: Final answer
    x = 77,369.38

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1.5x scale

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.