Home / 81,768,979.22-122,708,013.06-42,413,504.15

Finding the Fourth Proportional to 81,768,979.22, 122,708,013.06 and 42,413,504.15

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Solution

The fourth proportional to 81,768,979.22, 122,708,013.06 and 42,413,504.15 is: 63,648,548.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,768,979.22 : 122,708,013.06 = 42,413,504.15 : x
  2. Step 2: Convert to fraction form
    81,768,979.22/122,708,013.06 = 42,413,504.15/x
  3. Step 3: Cross multiply
    81,768,979.22x = 122,708,013.06 × 42,413,504.15
  4. Step 4: Simplify right side
    81,768,979.22x = 5,204,476,821,158,564
  5. Step 5: Solve for x
    x = 5,204,476,821,158,564/81,768,979.22
  6. Step 6: Final answer
    x = 63,648,548.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.