Home / 74,579.54-111,869.05-21,270.40

Finding the Fourth Proportional to 74,579.54, 111,869.05 and 21,270.40

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Solution

The fourth proportional to 74,579.54, 111,869.05 and 21,270.40 is: 31,905.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,579.54 : 111,869.05 = 21,270.40 : x
  2. Step 2: Convert to fraction form
    74,579.54/111,869.05 = 21,270.40/x
  3. Step 3: Cross multiply
    74,579.54x = 111,869.05 × 21,270.40
  4. Step 4: Simplify right side
    74,579.54x = 2,379,499,148.15
  5. Step 5: Solve for x
    x = 2,379,499,148.15/74,579.54
  6. Step 6: Final answer
    x = 31,905.52

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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.