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Finding the Fourth Proportional to 89,698.70, 123,774.90 and 55,237.95

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Solution

The fourth proportional to 89,698.70, 123,774.90 and 55,237.95 is: 76,222.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,698.70 : 123,774.90 = 55,237.95 : x
  2. Step 2: Convert to fraction form
    89,698.70/123,774.90 = 55,237.95/x
  3. Step 3: Cross multiply
    89,698.70x = 123,774.90 × 55,237.95
  4. Step 4: Simplify right side
    89,698.70x = 6,837,071,737.46
  5. Step 5: Solve for x
    x = 6,837,071,737.46/89,698.70
  6. Step 6: Final answer
    x = 76,222.64

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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.