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Finding the Fourth Proportional to 66,420.48, 91,658.80 and 36,204.64

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Solution

The fourth proportional to 66,420.48, 91,658.80 and 36,204.64 is: 49,961.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,420.48 : 91,658.80 = 36,204.64 : x
  2. Step 2: Convert to fraction form
    66,420.48/91,658.80 = 36,204.64/x
  3. Step 3: Cross multiply
    66,420.48x = 91,658.80 × 36,204.64
  4. Step 4: Simplify right side
    66,420.48x = 3,318,473,766.32
  5. Step 5: Solve for x
    x = 3,318,473,766.32/66,420.48
  6. Step 6: Final answer
    x = 49,961.61

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1.5x scale

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.