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Finding the Fourth Proportional to 84,609,643.60, 126,715,399.80 and 84,609,643.60

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Solution

The fourth proportional to 84,609,643.60, 126,715,399.80 and 84,609,643.60 is: 126,715,399.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,609,643.60 : 126,715,399.80 = 84,609,643.60 : x
  2. Step 2: Convert to fraction form
    84,609,643.60/126,715,399.80 = 84,609,643.60/x
  3. Step 3: Cross multiply
    84,609,643.60x = 126,715,399.80 × 84,609,643.60
  4. Step 4: Simplify right side
    84,609,643.60x = 10,721,344,815,709,510
  5. Step 5: Solve for x
    x = 10,721,344,815,709,510/84,609,643.60
  6. Step 6: Final answer
    x = 126,715,399.80

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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.