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Finding the Fourth Proportional to 101,172.80, 139,617.70 and 55,850.80

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Solution

The fourth proportional to 101,172.80, 139,617.70 and 55,850.80 is: 77,073.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,172.80 : 139,617.70 = 55,850.80 : x
  2. Step 2: Convert to fraction form
    101,172.80/139,617.70 = 55,850.80/x
  3. Step 3: Cross multiply
    101,172.80x = 139,617.70 × 55,850.80
  4. Step 4: Simplify right side
    101,172.80x = 7,797,760,239.16
  5. Step 5: Solve for x
    x = 7,797,760,239.16/101,172.80
  6. Step 6: Final answer
    x = 77,073.68

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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.