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Finding the Fourth Proportional to 68,752.20, 103,130.73 and 21,999

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Solution

The fourth proportional to 68,752.20, 103,130.73 and 21,999 is: 32,999.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,752.20 : 103,130.73 = 21,999 : x
  2. Step 2: Convert to fraction form
    68,752.20/103,130.73 = 21,999/x
  3. Step 3: Cross multiply
    68,752.20x = 103,130.73 × 21,999
  4. Step 4: Simplify right side
    68,752.20x = 2,268,772,929.27
  5. Step 5: Solve for x
    x = 2,268,772,929.27/68,752.20
  6. Step 6: Final answer
    x = 32,999.28

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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.