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Finding the Fourth Proportional to 66,203, 91,438.14 and 43,808.12

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Solution

The fourth proportional to 66,203, 91,438.14 and 43,808.12 is: 60,506.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,203 : 91,438.14 = 43,808.12 : x
  2. Step 2: Convert to fraction form
    66,203/91,438.14 = 43,808.12/x
  3. Step 3: Cross multiply
    66,203x = 91,438.14 × 43,808.12
  4. Step 4: Simplify right side
    66,203x = 4,005,733,009.70
  5. Step 5: Solve for x
    x = 4,005,733,009.70/66,203
  6. Step 6: Final answer
    x = 60,506.82

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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.