Home / 81,211,558.88-111,947,967.88-49,791,438.40

Finding the Fourth Proportional to 81,211,558.88, 111,947,967.88 and 49,791,438.40

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Solution

The fourth proportional to 81,211,558.88, 111,947,967.88 and 49,791,438.40 is: 68,636,169.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,211,558.88 : 111,947,967.88 = 49,791,438.40 : x
  2. Step 2: Convert to fraction form
    81,211,558.88/111,947,967.88 = 49,791,438.40/x
  3. Step 3: Cross multiply
    81,211,558.88x = 111,947,967.88 × 49,791,438.40
  4. Step 4: Simplify right side
    81,211,558.88x = 5,574,050,346,702,198
  5. Step 5: Solve for x
    x = 5,574,050,346,702,198/81,211,558.88
  6. Step 6: Final answer
    x = 68,636,169.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.