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Finding the Fourth Proportional to 76,281.42, 105,230.95 and 66,195.70

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Solution

The fourth proportional to 76,281.42, 105,230.95 and 66,195.70 is: 91,317.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,281.42 : 105,230.95 = 66,195.70 : x
  2. Step 2: Convert to fraction form
    76,281.42/105,230.95 = 66,195.70/x
  3. Step 3: Cross multiply
    76,281.42x = 105,230.95 × 66,195.70
  4. Step 4: Simplify right side
    76,281.42x = 6,965,836,396.92
  5. Step 5: Solve for x
    x = 6,965,836,396.92/76,281.42
  6. Step 6: Final answer
    x = 91,317.60

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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.