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Finding the Fourth Proportional to 74,420, 111,600.84 and 30,038.48

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Solution

The fourth proportional to 74,420, 111,600.84 and 30,038.48 is: 45,045.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,420 : 111,600.84 = 30,038.48 : x
  2. Step 2: Convert to fraction form
    74,420/111,600.84 = 30,038.48/x
  3. Step 3: Cross multiply
    74,420x = 111,600.84 × 30,038.48
  4. Step 4: Simplify right side
    74,420x = 3,352,319,600.32
  5. Step 5: Solve for x
    x = 3,352,319,600.32/74,420
  6. Step 6: Final answer
    x = 45,045.95

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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.