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Finding the Fourth Proportional to 66,366.54, 99,539.28 and 21,991.50

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Solution

The fourth proportional to 66,366.54, 99,539.28 and 21,991.50 is: 32,983.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,366.54 : 99,539.28 = 21,991.50 : x
  2. Step 2: Convert to fraction form
    66,366.54/99,539.28 = 21,991.50/x
  3. Step 3: Cross multiply
    66,366.54x = 99,539.28 × 21,991.50
  4. Step 4: Simplify right side
    66,366.54x = 2,189,018,076.12
  5. Step 5: Solve for x
    x = 2,189,018,076.12/66,366.54
  6. Step 6: Final answer
    x = 32,983.76

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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.