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Finding the Fourth Proportional to 147,563.80, 221,460.90 and 68,687.80

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Solution

The fourth proportional to 147,563.80, 221,460.90 and 68,687.80 is: 103,085.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,563.80 : 221,460.90 = 68,687.80 : x
  2. Step 2: Convert to fraction form
    147,563.80/221,460.90 = 68,687.80/x
  3. Step 3: Cross multiply
    147,563.80x = 221,460.90 × 68,687.80
  4. Step 4: Simplify right side
    147,563.80x = 15,211,662,007.02
  5. Step 5: Solve for x
    x = 15,211,662,007.02/147,563.80
  6. Step 6: Final answer
    x = 103,085.32

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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.