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Finding the Fourth Proportional to 69,370.58, 104,071.36 and 21,988.31

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Solution

The fourth proportional to 69,370.58, 104,071.36 and 21,988.31 is: 32,987.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,370.58 : 104,071.36 = 21,988.31 : x
  2. Step 2: Convert to fraction form
    69,370.58/104,071.36 = 21,988.31/x
  3. Step 3: Cross multiply
    69,370.58x = 104,071.36 × 21,988.31
  4. Step 4: Simplify right side
    69,370.58x = 2,288,353,315.26
  5. Step 5: Solve for x
    x = 2,288,353,315.26/69,370.58
  6. Step 6: Final answer
    x = 32,987.38

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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.