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Finding the Fourth Proportional to 66,128.80, 99,199.74 and 21,737.56

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Solution

The fourth proportional to 66,128.80, 99,199.74 and 21,737.56 is: 32,608.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,128.80 : 99,199.74 = 21,737.56 : x
  2. Step 2: Convert to fraction form
    66,128.80/99,199.74 = 21,737.56/x
  3. Step 3: Cross multiply
    66,128.80x = 99,199.74 × 21,737.56
  4. Step 4: Simplify right side
    66,128.80x = 2,156,360,300.23
  5. Step 5: Solve for x
    x = 2,156,360,300.23/66,128.80
  6. Step 6: Final answer
    x = 32,608.49

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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.