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Finding the Fourth Proportional to 66,561.40, 99,774.90 and 33,230.20

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Solution

The fourth proportional to 66,561.40, 99,774.90 and 33,230.20 is: 49,811.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,561.40 : 99,774.90 = 33,230.20 : x
  2. Step 2: Convert to fraction form
    66,561.40/99,774.90 = 33,230.20/x
  3. Step 3: Cross multiply
    66,561.40x = 99,774.90 × 33,230.20
  4. Step 4: Simplify right side
    66,561.40x = 3,315,539,881.98
  5. Step 5: Solve for x
    x = 3,315,539,881.98/66,561.40
  6. Step 6: Final answer
    x = 49,811.75

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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.