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Finding the Fourth Proportional to 74,376.95, 111,565.41 and 18,972.95

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Solution

The fourth proportional to 74,376.95, 111,565.41 and 18,972.95 is: 28,459.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,376.95 : 111,565.41 = 18,972.95 : x
  2. Step 2: Convert to fraction form
    74,376.95/111,565.41 = 18,972.95/x
  3. Step 3: Cross multiply
    74,376.95x = 111,565.41 × 18,972.95
  4. Step 4: Simplify right side
    74,376.95x = 2,116,724,387.83
  5. Step 5: Solve for x
    x = 2,116,724,387.83/74,376.95
  6. Step 6: Final answer
    x = 28,459.42

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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.