Home / 142,059.78-196,039.44-78,397.02

Finding the Fourth Proportional to 142,059.78, 196,039.44 and 78,397.02

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Solution

The fourth proportional to 142,059.78, 196,039.44 and 78,397.02 is: 108,186.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,059.78 : 196,039.44 = 78,397.02 : x
  2. Step 2: Convert to fraction form
    142,059.78/196,039.44 = 78,397.02/x
  3. Step 3: Cross multiply
    142,059.78x = 196,039.44 × 78,397.02
  4. Step 4: Simplify right side
    142,059.78x = 15,368,907,898.47
  5. Step 5: Solve for x
    x = 15,368,907,898.47/142,059.78
  6. Step 6: Final answer
    x = 108,186.20

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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.