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Finding the Fourth Proportional to 66,990.78, 100,500.75 and 22,615.64

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Solution

The fourth proportional to 66,990.78, 100,500.75 and 22,615.64 is: 33,928.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,990.78 : 100,500.75 = 22,615.64 : x
  2. Step 2: Convert to fraction form
    66,990.78/100,500.75 = 22,615.64/x
  3. Step 3: Cross multiply
    66,990.78x = 100,500.75 × 22,615.64
  4. Step 4: Simplify right side
    66,990.78x = 2,272,888,656.10
  5. Step 5: Solve for x
    x = 2,272,888,656.10/66,990.78
  6. Step 6: Final answer
    x = 33,928.38

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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.