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Finding the Fourth Proportional to 74,587.32, 111,880.98 and 19,179

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Solution

The fourth proportional to 74,587.32, 111,880.98 and 19,179 is: 28,768.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,587.32 : 111,880.98 = 19,179 : x
  2. Step 2: Convert to fraction form
    74,587.32/111,880.98 = 19,179/x
  3. Step 3: Cross multiply
    74,587.32x = 111,880.98 × 19,179
  4. Step 4: Simplify right side
    74,587.32x = 2,145,765,315.42
  5. Step 5: Solve for x
    x = 2,145,765,315.42/74,587.32
  6. Step 6: Final answer
    x = 28,768.50

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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.