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Finding the Fourth Proportional to 299,657,287.80, 449,515,869.30 and 81,311,095.80

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Solution

The fourth proportional to 299,657,287.80, 449,515,869.30 and 81,311,095.80 is: 121,974,767.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,657,287.80 : 449,515,869.30 = 81,311,095.80 : x
  2. Step 2: Convert to fraction form
    299,657,287.80/449,515,869.30 = 81,311,095.80/x
  3. Step 3: Cross multiply
    299,657,287.80x = 449,515,869.30 × 81,311,095.80
  4. Step 4: Simplify right side
    299,657,287.80x = 36,550,627,912,272,576
  5. Step 5: Solve for x
    x = 36,550,627,912,272,576/299,657,287.80
  6. Step 6: Final answer
    x = 121,974,767.18

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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.