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Finding the Fourth Proportional to 66,438.42, 91,710.62 and 48,674.52

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Solution

The fourth proportional to 66,438.42, 91,710.62 and 48,674.52 is: 67,189.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,438.42 : 91,710.62 = 48,674.52 : x
  2. Step 2: Convert to fraction form
    66,438.42/91,710.62 = 48,674.52/x
  3. Step 3: Cross multiply
    66,438.42x = 91,710.62 × 48,674.52
  4. Step 4: Simplify right side
    66,438.42x = 4,463,970,407.40
  5. Step 5: Solve for x
    x = 4,463,970,407.40/66,438.42
  6. Step 6: Final answer
    x = 67,189.59

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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.