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Finding the Fourth Proportional to 299,656,686.80, 449,514,967.80 and 81,310,494.80

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Solution

The fourth proportional to 299,656,686.80, 449,514,967.80 and 81,310,494.80 is: 121,973,865.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,656,686.80 : 449,514,967.80 = 81,310,494.80 : x
  2. Step 2: Convert to fraction form
    299,656,686.80/449,514,967.80 = 81,310,494.80/x
  3. Step 3: Cross multiply
    299,656,686.80x = 449,514,967.80 × 81,310,494.80
  4. Step 4: Simplify right side
    299,656,686.80x = 36,550,284,451,824,064
  5. Step 5: Solve for x
    x = 36,550,284,451,824,064/299,656,686.80
  6. Step 6: Final answer
    x = 121,973,865.63

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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.