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Finding the Fourth Proportional to 66,220.80, 99,304.80 and 21,835.20

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Solution

The fourth proportional to 66,220.80, 99,304.80 and 21,835.20 is: 32,744.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,220.80 : 99,304.80 = 21,835.20 : x
  2. Step 2: Convert to fraction form
    66,220.80/99,304.80 = 21,835.20/x
  3. Step 3: Cross multiply
    66,220.80x = 99,304.80 × 21,835.20
  4. Step 4: Simplify right side
    66,220.80x = 2,168,340,168.96
  5. Step 5: Solve for x
    x = 2,168,340,168.96/66,220.80
  6. Step 6: Final answer
    x = 32,744.10

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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.