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Finding the Fourth Proportional to 86,231,531.70, 129,347,297.55 and 86,231,531.70

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Solution

The fourth proportional to 86,231,531.70, 129,347,297.55 and 86,231,531.70 is: 129,347,297.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,231,531.70 : 129,347,297.55 = 86,231,531.70 : x
  2. Step 2: Convert to fraction form
    86,231,531.70/129,347,297.55 = 86,231,531.70/x
  3. Step 3: Cross multiply
    86,231,531.70x = 129,347,297.55 × 86,231,531.70
  4. Step 4: Simplify right side
    86,231,531.70x = 11,153,815,588,992,158
  5. Step 5: Solve for x
    x = 11,153,815,588,992,158/86,231,531.70
  6. Step 6: Final answer
    x = 129,347,297.55

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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.