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Finding the Fourth Proportional to 66,381.51, 99,572.27 and 19,630.74

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Solution

The fourth proportional to 66,381.51, 99,572.27 and 19,630.74 is: 29,446.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,381.51 : 99,572.27 = 19,630.74 : x
  2. Step 2: Convert to fraction form
    66,381.51/99,572.27 = 19,630.74/x
  3. Step 3: Cross multiply
    66,381.51x = 99,572.27 × 19,630.74
  4. Step 4: Simplify right side
    66,381.51x = 1,954,677,245.43
  5. Step 5: Solve for x
    x = 1,954,677,245.43/66,381.51
  6. Step 6: Final answer
    x = 29,446.11

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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.