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Finding the Fourth Proportional to 66,742.56, 92,051.64 and 42,871.68

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Solution

The fourth proportional to 66,742.56, 92,051.64 and 42,871.68 is: 59,128.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,742.56 : 92,051.64 = 42,871.68 : x
  2. Step 2: Convert to fraction form
    66,742.56/92,051.64 = 42,871.68/x
  3. Step 3: Cross multiply
    66,742.56x = 92,051.64 × 42,871.68
  4. Step 4: Simplify right side
    66,742.56x = 3,946,408,453.56
  5. Step 5: Solve for x
    x = 3,946,408,453.56/66,742.56
  6. Step 6: Final answer
    x = 59,128.81

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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.