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Finding the Fourth Proportional to 79,727,881.20, 111,694,616.40 and 79,727,881.20

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Solution

The fourth proportional to 79,727,881.20, 111,694,616.40 and 79,727,881.20 is: 111,694,616.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,727,881.20 : 111,694,616.40 = 79,727,881.20 : x
  2. Step 2: Convert to fraction form
    79,727,881.20/111,694,616.40 = 79,727,881.20/x
  3. Step 3: Cross multiply
    79,727,881.20x = 111,694,616.40 × 79,727,881.20
  4. Step 4: Simplify right side
    79,727,881.20x = 8,905,175,107,018,772
  5. Step 5: Solve for x
    x = 8,905,175,107,018,772/79,727,881.20
  6. Step 6: Final answer
    x = 111,694,616.40

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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.