Home / 81,692,999.70-122,539,499.55-72,764,790.90

Finding the Fourth Proportional to 81,692,999.70, 122,539,499.55 and 72,764,790.90

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Solution

The fourth proportional to 81,692,999.70, 122,539,499.55 and 72,764,790.90 is: 109,147,186.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,692,999.70 : 122,539,499.55 = 72,764,790.90 : x
  2. Step 2: Convert to fraction form
    81,692,999.70/122,539,499.55 = 72,764,790.90/x
  3. Step 3: Cross multiply
    81,692,999.70x = 122,539,499.55 × 72,764,790.90
  4. Step 4: Simplify right side
    81,692,999.70x = 8,916,561,061,746,395
  5. Step 5: Solve for x
    x = 8,916,561,061,746,395/81,692,999.70
  6. Step 6: Final answer
    x = 109,147,186.35

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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.