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Finding the Fourth Proportional to 66,513.84, 91,822.96 and 51,372.51

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Solution

The fourth proportional to 66,513.84, 91,822.96 and 51,372.51 is: 70,920.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,513.84 : 91,822.96 = 51,372.51 : x
  2. Step 2: Convert to fraction form
    66,513.84/91,822.96 = 51,372.51/x
  3. Step 3: Cross multiply
    66,513.84x = 91,822.96 × 51,372.51
  4. Step 4: Simplify right side
    66,513.84x = 4,717,175,930.83
  5. Step 5: Solve for x
    x = 4,717,175,930.83/66,513.84
  6. Step 6: Final answer
    x = 70,920.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.