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Finding the Fourth Proportional to 89,664.84, 123,737.85 and 51,425.87

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Solution

The fourth proportional to 89,664.84, 123,737.85 and 51,425.87 is: 70,967.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,664.84 : 123,737.85 = 51,425.87 : x
  2. Step 2: Convert to fraction form
    89,664.84/123,737.85 = 51,425.87/x
  3. Step 3: Cross multiply
    89,664.84x = 123,737.85 × 51,425.87
  4. Step 4: Simplify right side
    89,664.84x = 6,363,325,969.49
  5. Step 5: Solve for x
    x = 6,363,325,969.49/89,664.84
  6. Step 6: Final answer
    x = 70,967.91

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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.