Home / 142,203.31-196,223.78-78,537.31

Finding the Fourth Proportional to 142,203.31, 196,223.78 and 78,537.31

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Solution

The fourth proportional to 142,203.31, 196,223.78 and 78,537.31 is: 108,372.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,203.31 : 196,223.78 = 78,537.31 : x
  2. Step 2: Convert to fraction form
    142,203.31/196,223.78 = 78,537.31/x
  3. Step 3: Cross multiply
    142,203.31x = 196,223.78 × 78,537.31
  4. Step 4: Simplify right side
    142,203.31x = 15,410,886,465.43
  5. Step 5: Solve for x
    x = 15,410,886,465.43/142,203.31
  6. Step 6: Final answer
    x = 108,372.21

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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.