Home / 81,140,734.14-121,420,171.89-70,248,389.82

Finding the Fourth Proportional to 81,140,734.14, 121,420,171.89 and 70,248,389.82

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Solution

The fourth proportional to 81,140,734.14, 121,420,171.89 and 70,248,389.82 is: 105,120,709.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,140,734.14 : 121,420,171.89 = 70,248,389.82 : x
  2. Step 2: Convert to fraction form
    81,140,734.14/121,420,171.89 = 70,248,389.82/x
  3. Step 3: Cross multiply
    81,140,734.14x = 121,420,171.89 × 70,248,389.82
  4. Step 4: Simplify right side
    81,140,734.14x = 8,529,571,566,940,125
  5. Step 5: Solve for x
    x = 8,529,571,566,940,125/81,140,734.14
  6. Step 6: Final answer
    x = 105,120,709.81

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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.