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Finding the Fourth Proportional to 69,898.33, 104,850.95 and 19,985.77

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Solution

The fourth proportional to 69,898.33, 104,850.95 and 19,985.77 is: 29,979.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,898.33 : 104,850.95 = 19,985.77 : x
  2. Step 2: Convert to fraction form
    69,898.33/104,850.95 = 19,985.77/x
  3. Step 3: Cross multiply
    69,898.33x = 104,850.95 × 19,985.77
  4. Step 4: Simplify right side
    69,898.33x = 2,095,526,970.98
  5. Step 5: Solve for x
    x = 2,095,526,970.98/69,898.33
  6. Step 6: Final answer
    x = 29,979.64

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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.