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Finding the Fourth Proportional to 68,356,797.84, 102,535,093.08 and 20,487,741.84

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Solution

The fourth proportional to 68,356,797.84, 102,535,093.08 and 20,487,741.84 is: 30,731,581.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,356,797.84 : 102,535,093.08 = 20,487,741.84 : x
  2. Step 2: Convert to fraction form
    68,356,797.84/102,535,093.08 = 20,487,741.84/x
  3. Step 3: Cross multiply
    68,356,797.84x = 102,535,093.08 × 20,487,741.84
  4. Step 4: Simplify right side
    68,356,797.84x = 2,100,712,516,563,410.50
  5. Step 5: Solve for x
    x = 2,100,712,516,563,410.50/68,356,797.84
  6. Step 6: Final answer
    x = 30,731,581.69

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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.