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Finding the Fourth Proportional to 66,051.60, 99,091.80 and 21,670.80

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Solution

The fourth proportional to 66,051.60, 99,091.80 and 21,670.80 is: 32,510.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,051.60 : 99,091.80 = 21,670.80 : x
  2. Step 2: Convert to fraction form
    66,051.60/99,091.80 = 21,670.80/x
  3. Step 3: Cross multiply
    66,051.60x = 99,091.80 × 21,670.80
  4. Step 4: Simplify right side
    66,051.60x = 2,147,398,579.44
  5. Step 5: Solve for x
    x = 2,147,398,579.44/66,051.60
  6. Step 6: Final answer
    x = 32,510.92

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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.