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Finding the Fourth Proportional to 299,657,256.80, 449,515,822.80 and 81,311,064.80

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Solution

The fourth proportional to 299,657,256.80, 449,515,822.80 and 81,311,064.80 is: 121,974,720.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,657,256.80 : 449,515,822.80 = 81,311,064.80 : x
  2. Step 2: Convert to fraction form
    299,657,256.80/449,515,822.80 = 81,311,064.80/x
  3. Step 3: Cross multiply
    299,657,256.80x = 449,515,822.80 × 81,311,064.80
  4. Step 4: Simplify right side
    299,657,256.80x = 36,550,610,196,316,120
  5. Step 5: Solve for x
    x = 36,550,610,196,316,120/299,657,256.80
  6. Step 6: Final answer
    x = 121,974,720.67

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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.