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Finding the Fourth Proportional to 74,940.58, 112,410.06 and 18,780.04

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Solution

The fourth proportional to 74,940.58, 112,410.06 and 18,780.04 is: 28,169.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,940.58 : 112,410.06 = 18,780.04 : x
  2. Step 2: Convert to fraction form
    74,940.58/112,410.06 = 18,780.04/x
  3. Step 3: Cross multiply
    74,940.58x = 112,410.06 × 18,780.04
  4. Step 4: Simplify right side
    74,940.58x = 2,111,065,423.20
  5. Step 5: Solve for x
    x = 2,111,065,423.20/74,940.58
  6. Step 6: Final answer
    x = 28,169.86

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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.