Home / 142,091.10-196,084.64-78,428.88

Finding the Fourth Proportional to 142,091.10, 196,084.64 and 78,428.88

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Solution

The fourth proportional to 142,091.10, 196,084.64 and 78,428.88 is: 108,231.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,091.10 : 196,084.64 = 78,428.88 : x
  2. Step 2: Convert to fraction form
    142,091.10/196,084.64 = 78,428.88/x
  3. Step 3: Cross multiply
    142,091.10x = 196,084.64 × 78,428.88
  4. Step 4: Simplify right side
    142,091.10x = 15,378,698,308.26
  5. Step 5: Solve for x
    x = 15,378,698,308.26/142,091.10
  6. Step 6: Final answer
    x = 108,231.26

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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.