Home / 142,042.63-196,013.10-78,379.60

Finding the Fourth Proportional to 142,042.63, 196,013.10 and 78,379.60

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Solution

The fourth proportional to 142,042.63, 196,013.10 and 78,379.60 is: 108,160.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,042.63 : 196,013.10 = 78,379.60 : x
  2. Step 2: Convert to fraction form
    142,042.63/196,013.10 = 78,379.60/x
  3. Step 3: Cross multiply
    142,042.63x = 196,013.10 × 78,379.60
  4. Step 4: Simplify right side
    142,042.63x = 15,363,428,372.76
  5. Step 5: Solve for x
    x = 15,363,428,372.76/142,042.63
  6. Step 6: Final answer
    x = 108,160.69

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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.