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Finding the Fourth Proportional to 101,168, 139,840.80 and 92,185.28

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Solution

The fourth proportional to 101,168, 139,840.80 and 92,185.28 is: 127,424.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,168 : 139,840.80 = 92,185.28 : x
  2. Step 2: Convert to fraction form
    101,168/139,840.80 = 92,185.28/x
  3. Step 3: Cross multiply
    101,168x = 139,840.80 × 92,185.28
  4. Step 4: Simplify right side
    101,168x = 12,891,263,303.42
  5. Step 5: Solve for x
    x = 12,891,263,303.42/101,168
  6. Step 6: Final answer
    x = 127,424.32

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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.