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Finding the Fourth Proportional to 66,988.34, 92,424.97 and 43,128.83

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Solution

The fourth proportional to 66,988.34, 92,424.97 and 43,128.83 is: 59,505.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,988.34 : 92,424.97 = 43,128.83 : x
  2. Step 2: Convert to fraction form
    66,988.34/92,424.97 = 43,128.83/x
  3. Step 3: Cross multiply
    66,988.34x = 92,424.97 × 43,128.83
  4. Step 4: Simplify right side
    66,988.34x = 3,986,180,818.89
  5. Step 5: Solve for x
    x = 3,986,180,818.89/66,988.34
  6. Step 6: Final answer
    x = 59,505.59

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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.