Home / 85,824,267.70-128,736,401.55-21,127,558.90

Finding the Fourth Proportional to 85,824,267.70, 128,736,401.55 and 21,127,558.90

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Solution

The fourth proportional to 85,824,267.70, 128,736,401.55 and 21,127,558.90 is: 31,691,338.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,824,267.70 : 128,736,401.55 = 21,127,558.90 : x
  2. Step 2: Convert to fraction form
    85,824,267.70/128,736,401.55 = 21,127,558.90/x
  3. Step 3: Cross multiply
    85,824,267.70x = 128,736,401.55 × 21,127,558.90
  4. Step 4: Simplify right side
    85,824,267.70x = 2,719,885,906,321,676
  5. Step 5: Solve for x
    x = 2,719,885,906,321,676/85,824,267.70
  6. Step 6: Final answer
    x = 31,691,338.35

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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.