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Finding the Fourth Proportional to 74,476.40, 111,703.80 and 21,880.40

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Solution

The fourth proportional to 74,476.40, 111,703.80 and 21,880.40 is: 32,817.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,476.40 : 111,703.80 = 21,880.40 : x
  2. Step 2: Convert to fraction form
    74,476.40/111,703.80 = 21,880.40/x
  3. Step 3: Cross multiply
    74,476.40x = 111,703.80 × 21,880.40
  4. Step 4: Simplify right side
    74,476.40x = 2,444,123,825.52
  5. Step 5: Solve for x
    x = 2,444,123,825.52/74,476.40
  6. Step 6: Final answer
    x = 32,817.43

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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.