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Finding the Fourth Proportional to 258,672.21, 388,066.67 and 78,773.73

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Solution

The fourth proportional to 258,672.21, 388,066.67 and 78,773.73 is: 118,178.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,672.21 : 388,066.67 = 78,773.73 : x
  2. Step 2: Convert to fraction form
    258,672.21/388,066.67 = 78,773.73/x
  3. Step 3: Cross multiply
    258,672.21x = 388,066.67 × 78,773.73
  4. Step 4: Simplify right side
    258,672.21x = 30,569,459,084.58
  5. Step 5: Solve for x
    x = 30,569,459,084.58/258,672.21
  6. Step 6: Final answer
    x = 118,178.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.