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Finding the Fourth Proportional to 85,348.66, 117,836.63 and 76,380.75

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Solution

The fourth proportional to 85,348.66, 117,836.63 and 76,380.75 is: 105,455.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,348.66 : 117,836.63 = 76,380.75 : x
  2. Step 2: Convert to fraction form
    85,348.66/117,836.63 = 76,380.75/x
  3. Step 3: Cross multiply
    85,348.66x = 117,836.63 × 76,380.75
  4. Step 4: Simplify right side
    85,348.66x = 9,000,449,396.74
  5. Step 5: Solve for x
    x = 9,000,449,396.74/85,348.66
  6. Step 6: Final answer
    x = 105,455.08

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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.