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Finding the Fourth Proportional to 101,316.44, 139,640.69 and 74,047.88

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Solution

The fourth proportional to 101,316.44, 139,640.69 and 74,047.88 is: 102,057.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,316.44 : 139,640.69 = 74,047.88 : x
  2. Step 2: Convert to fraction form
    101,316.44/139,640.69 = 74,047.88/x
  3. Step 3: Cross multiply
    101,316.44x = 139,640.69 × 74,047.88
  4. Step 4: Simplify right side
    101,316.44x = 10,340,097,590.46
  5. Step 5: Solve for x
    x = 10,340,097,590.46/101,316.44
  6. Step 6: Final answer
    x = 102,057.46

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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.