Home / 142,435,768.68-196,557,138.95-78,858,941.18

Finding the Fourth Proportional to 142,435,768.68, 196,557,138.95 and 78,858,941.18

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Solution

The fourth proportional to 142,435,768.68, 196,557,138.95 and 78,858,941.18 is: 108,823,001.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,435,768.68 : 196,557,138.95 = 78,858,941.18 : x
  2. Step 2: Convert to fraction form
    142,435,768.68/196,557,138.95 = 78,858,941.18/x
  3. Step 3: Cross multiply
    142,435,768.68x = 196,557,138.95 × 78,858,941.18
  4. Step 4: Simplify right side
    142,435,768.68x = 15,500,287,857,590,056
  5. Step 5: Solve for x
    x = 15,500,287,857,590,056/142,435,768.68
  6. Step 6: Final answer
    x = 108,823,001.42

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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.