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Finding the Fourth Proportional to 66,079.60, 99,089.96 and 21,092.67

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Solution

The fourth proportional to 66,079.60, 99,089.96 and 21,092.67 is: 31,629.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,079.60 : 99,089.96 = 21,092.67 : x
  2. Step 2: Convert to fraction form
    66,079.60/99,089.96 = 21,092.67/x
  3. Step 3: Cross multiply
    66,079.60x = 99,089.96 × 21,092.67
  4. Step 4: Simplify right side
    66,079.60x = 2,090,071,721.13
  5. Step 5: Solve for x
    x = 2,090,071,721.13/66,079.60
  6. Step 6: Final answer
    x = 31,629.61

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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.