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Finding the Fourth Proportional to 147,721, 221,581.50 and 36,913

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Solution

The fourth proportional to 147,721, 221,581.50 and 36,913 is: 55,369.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,721 : 221,581.50 = 36,913 : x
  2. Step 2: Convert to fraction form
    147,721/221,581.50 = 36,913/x
  3. Step 3: Cross multiply
    147,721x = 221,581.50 × 36,913
  4. Step 4: Simplify right side
    147,721x = 8,179,237,909.50
  5. Step 5: Solve for x
    x = 8,179,237,909.50/147,721
  6. Step 6: Final answer
    x = 55,369.50

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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.