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Finding the Fourth Proportional to 74,311, 111,457.54 and 18,907.48

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Solution

The fourth proportional to 74,311, 111,457.54 and 18,907.48 is: 28,358.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,311 : 111,457.54 = 18,907.48 : x
  2. Step 2: Convert to fraction form
    74,311/111,457.54 = 18,907.48/x
  3. Step 3: Cross multiply
    74,311x = 111,457.54 × 18,907.48
  4. Step 4: Simplify right side
    74,311x = 2,107,381,208.40
  5. Step 5: Solve for x
    x = 2,107,381,208.40/74,311
  6. Step 6: Final answer
    x = 28,358.94

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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.