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Finding the Fourth Proportional to 129,027,287.20, 180,877,080.80 and 129,027,287.20

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Solution

The fourth proportional to 129,027,287.20, 180,877,080.80 and 129,027,287.20 is: 180,877,080.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,027,287.20 : 180,877,080.80 = 129,027,287.20 : x
  2. Step 2: Convert to fraction form
    129,027,287.20/180,877,080.80 = 129,027,287.20/x
  3. Step 3: Cross multiply
    129,027,287.20x = 180,877,080.80 × 129,027,287.20
  4. Step 4: Simplify right side
    129,027,287.20x = 23,338,079,052,279,208
  5. Step 5: Solve for x
    x = 23,338,079,052,279,208/129,027,287.20
  6. Step 6: Final answer
    x = 180,877,080.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.