Home / 142,121.76-196,126.76-78,458.19

Finding the Fourth Proportional to 142,121.76, 196,126.76 and 78,458.19

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Solution

The fourth proportional to 142,121.76, 196,126.76 and 78,458.19 is: 108,271.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,121.76 : 196,126.76 = 78,458.19 : x
  2. Step 2: Convert to fraction form
    142,121.76/196,126.76 = 78,458.19/x
  3. Step 3: Cross multiply
    142,121.76x = 196,126.76 × 78,458.19
  4. Step 4: Simplify right side
    142,121.76x = 15,387,750,796.31
  5. Step 5: Solve for x
    x = 15,387,750,796.31/142,121.76
  6. Step 6: Final answer
    x = 108,271.60

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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.