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Finding the Fourth Proportional to 81,651,377.70, 122,477,066.55 and 81,651,377.70

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Solution

The fourth proportional to 81,651,377.70, 122,477,066.55 and 81,651,377.70 is: 122,477,066.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,651,377.70 : 122,477,066.55 = 81,651,377.70 : x
  2. Step 2: Convert to fraction form
    81,651,377.70/122,477,066.55 = 81,651,377.70/x
  3. Step 3: Cross multiply
    81,651,377.70x = 122,477,066.55 × 81,651,377.70
  4. Step 4: Simplify right side
    81,651,377.70x = 10,000,421,220,462,086
  5. Step 5: Solve for x
    x = 10,000,421,220,462,086/81,651,377.70
  6. Step 6: Final answer
    x = 122,477,066.55

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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.