Home / 81,657,016.60-122,485,524.90-21,072,742.60

Finding the Fourth Proportional to 81,657,016.60, 122,485,524.90 and 21,072,742.60

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Solution

The fourth proportional to 81,657,016.60, 122,485,524.90 and 21,072,742.60 is: 31,609,113.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,657,016.60 : 122,485,524.90 = 21,072,742.60 : x
  2. Step 2: Convert to fraction form
    81,657,016.60/122,485,524.90 = 21,072,742.60/x
  3. Step 3: Cross multiply
    81,657,016.60x = 122,485,524.90 × 21,072,742.60
  4. Step 4: Simplify right side
    81,657,016.60x = 2,581,105,938,443,591
  5. Step 5: Solve for x
    x = 2,581,105,938,443,591/81,657,016.60
  6. Step 6: Final answer
    x = 31,609,113.90

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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.