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Finding the Fourth Proportional to 66,420.54, 91,658.88 and 36,204.70

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Solution

The fourth proportional to 66,420.54, 91,658.88 and 36,204.70 is: 49,961.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,420.54 : 91,658.88 = 36,204.70 : x
  2. Step 2: Convert to fraction form
    66,420.54/91,658.88 = 36,204.70/x
  3. Step 3: Cross multiply
    66,420.54x = 91,658.88 × 36,204.70
  4. Step 4: Simplify right side
    66,420.54x = 3,318,482,252.74
  5. Step 5: Solve for x
    x = 3,318,482,252.74/66,420.54
  6. Step 6: Final answer
    x = 49,961.69

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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.