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Finding the Fourth Proportional to 86,231,480.20, 129,347,220.30 and 86,231,480.20

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Solution

The fourth proportional to 86,231,480.20, 129,347,220.30 and 86,231,480.20 is: 129,347,220.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,231,480.20 : 129,347,220.30 = 86,231,480.20 : x
  2. Step 2: Convert to fraction form
    86,231,480.20/129,347,220.30 = 86,231,480.20/x
  3. Step 3: Cross multiply
    86,231,480.20x = 129,347,220.30 × 86,231,480.20
  4. Step 4: Simplify right side
    86,231,480.20x = 11,153,802,266,224,488
  5. Step 5: Solve for x
    x = 11,153,802,266,224,488/86,231,480.20
  6. Step 6: Final answer
    x = 129,347,220.30

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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.