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Finding the Fourth Proportional to 69,901.54, 104,855.55 and 19,988.76

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Solution

The fourth proportional to 69,901.54, 104,855.55 and 19,988.76 is: 29,984.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,901.54 : 104,855.55 = 19,988.76 : x
  2. Step 2: Convert to fraction form
    69,901.54/104,855.55 = 19,988.76/x
  3. Step 3: Cross multiply
    69,901.54x = 104,855.55 × 19,988.76
  4. Step 4: Simplify right side
    69,901.54x = 2,095,932,423.62
  5. Step 5: Solve for x
    x = 2,095,932,423.62/69,901.54
  6. Step 6: Final answer
    x = 29,984.07

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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.