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Finding the Fourth Proportional to 86,207,112.80, 129,310,669.20 and 86,207,112.80

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Solution

The fourth proportional to 86,207,112.80, 129,310,669.20 and 86,207,112.80 is: 129,310,669.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,207,112.80 : 129,310,669.20 = 86,207,112.80 : x
  2. Step 2: Convert to fraction form
    86,207,112.80/129,310,669.20 = 86,207,112.80/x
  3. Step 3: Cross multiply
    86,207,112.80x = 129,310,669.20 × 86,207,112.80
  4. Step 4: Simplify right side
    86,207,112.80x = 11,147,499,445,967,886
  5. Step 5: Solve for x
    x = 11,147,499,445,967,886/86,207,112.80
  6. Step 6: Final answer
    x = 129,310,669.20

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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.