Home / 86,660,145.30-129,988,905.76-21,081,900.54

Finding the Fourth Proportional to 86,660,145.30, 129,988,905.76 and 21,081,900.54

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Solution

The fourth proportional to 86,660,145.30, 129,988,905.76 and 21,081,900.54 is: 31,622,531.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,660,145.30 : 129,988,905.76 = 21,081,900.54 : x
  2. Step 2: Convert to fraction form
    86,660,145.30/129,988,905.76 = 21,081,900.54/x
  3. Step 3: Cross multiply
    86,660,145.30x = 129,988,905.76 × 21,081,900.54
  4. Step 4: Simplify right side
    86,660,145.30x = 2,740,413,182,930,872.50
  5. Step 5: Solve for x
    x = 2,740,413,182,930,872.50/86,660,145.30
  6. Step 6: Final answer
    x = 31,622,531.60

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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.