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Finding the Fourth Proportional to 66,278.40, 99,417.60 and 21,906.60

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Solution

The fourth proportional to 66,278.40, 99,417.60 and 21,906.60 is: 32,859.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,278.40 : 99,417.60 = 21,906.60 : x
  2. Step 2: Convert to fraction form
    66,278.40/99,417.60 = 21,906.60/x
  3. Step 3: Cross multiply
    66,278.40x = 99,417.60 × 21,906.60
  4. Step 4: Simplify right side
    66,278.40x = 2,177,901,596.16
  5. Step 5: Solve for x
    x = 2,177,901,596.16/66,278.40
  6. Step 6: Final answer
    x = 32,859.90

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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.