Home / 81,211,497.72-111,947,883.76-49,791,377.28

Finding the Fourth Proportional to 81,211,497.72, 111,947,883.76 and 49,791,377.28

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Solution

The fourth proportional to 81,211,497.72, 111,947,883.76 and 49,791,377.28 is: 68,636,085.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,211,497.72 : 111,947,883.76 = 49,791,377.28 : x
  2. Step 2: Convert to fraction form
    81,211,497.72/111,947,883.76 = 49,791,377.28/x
  3. Step 3: Cross multiply
    81,211,497.72x = 111,947,883.76 × 49,791,377.28
  4. Step 4: Simplify right side
    81,211,497.72x = 5,574,039,315,991,745
  5. Step 5: Solve for x
    x = 5,574,039,315,991,745/81,211,497.72
  6. Step 6: Final answer
    x = 68,636,085.68

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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.