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Finding the Fourth Proportional to 79,731,607.20, 111,699,832.80 and 79,731,607.20

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Solution

The fourth proportional to 79,731,607.20, 111,699,832.80 and 79,731,607.20 is: 111,699,832.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,731,607.20 : 111,699,832.80 = 79,731,607.20 : x
  2. Step 2: Convert to fraction form
    79,731,607.20/111,699,832.80 = 79,731,607.20/x
  3. Step 3: Cross multiply
    79,731,607.20x = 111,699,832.80 × 79,731,607.20
  4. Step 4: Simplify right side
    79,731,607.20x = 8,906,007,193,115,276
  5. Step 5: Solve for x
    x = 8,906,007,193,115,276/79,731,607.20
  6. Step 6: Final answer
    x = 111,699,832.80

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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.