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Finding the Fourth Proportional to 49,992.90, 74,990.70 and 21,898.50

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Solution

The fourth proportional to 49,992.90, 74,990.70 and 21,898.50 is: 32,848.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,992.90 : 74,990.70 = 21,898.50 : x
  2. Step 2: Convert to fraction form
    49,992.90/74,990.70 = 21,898.50/x
  3. Step 3: Cross multiply
    49,992.90x = 74,990.70 × 21,898.50
  4. Step 4: Simplify right side
    49,992.90x = 1,642,183,843.95
  5. Step 5: Solve for x
    x = 1,642,183,843.95/49,992.90
  6. Step 6: Final answer
    x = 32,848.34

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1.5x scale

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.