Home / 142,709.77-196,939.51-78,181.31

Finding the Fourth Proportional to 142,709.77, 196,939.51 and 78,181.31

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Solution

The fourth proportional to 142,709.77, 196,939.51 and 78,181.31 is: 107,890.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,709.77 : 196,939.51 = 78,181.31 : x
  2. Step 2: Convert to fraction form
    142,709.77/196,939.51 = 78,181.31/x
  3. Step 3: Cross multiply
    142,709.77x = 196,939.51 × 78,181.31
  4. Step 4: Simplify right side
    142,709.77x = 15,396,988,845.45
  5. Step 5: Solve for x
    x = 15,396,988,845.45/142,709.77
  6. Step 6: Final answer
    x = 107,890.22

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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.