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Finding the Fourth Proportional to 69,429.81, 104,060.95 and 31,938.45

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Solution

The fourth proportional to 69,429.81, 104,060.95 and 31,938.45 is: 47,869.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,429.81 : 104,060.95 = 31,938.45 : x
  2. Step 2: Convert to fraction form
    69,429.81/104,060.95 = 31,938.45/x
  3. Step 3: Cross multiply
    69,429.81x = 104,060.95 × 31,938.45
  4. Step 4: Simplify right side
    69,429.81x = 3,323,545,743.45
  5. Step 5: Solve for x
    x = 3,323,545,743.45/69,429.81
  6. Step 6: Final answer
    x = 47,869.15

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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.