Home / 81,956,053.40-122,934,080.10-77,253,128.60

Finding the Fourth Proportional to 81,956,053.40, 122,934,080.10 and 77,253,128.60

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Solution

The fourth proportional to 81,956,053.40, 122,934,080.10 and 77,253,128.60 is: 115,879,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,956,053.40 : 122,934,080.10 = 77,253,128.60 : x
  2. Step 2: Convert to fraction form
    81,956,053.40/122,934,080.10 = 77,253,128.60/x
  3. Step 3: Cross multiply
    81,956,053.40x = 122,934,080.10 × 77,253,128.60
  4. Step 4: Simplify right side
    81,956,053.40x = 9,497,042,299,288,000
  5. Step 5: Solve for x
    x = 9,497,042,299,288,000/81,956,053.40
  6. Step 6: Final answer
    x = 115,879,692.90

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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.