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Finding the Fourth Proportional to 70,553.80, 105,830.70 and 31,090.60

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Solution

The fourth proportional to 70,553.80, 105,830.70 and 31,090.60 is: 46,635.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,553.80 : 105,830.70 = 31,090.60 : x
  2. Step 2: Convert to fraction form
    70,553.80/105,830.70 = 31,090.60/x
  3. Step 3: Cross multiply
    70,553.80x = 105,830.70 × 31,090.60
  4. Step 4: Simplify right side
    70,553.80x = 3,290,339,961.42
  5. Step 5: Solve for x
    x = 3,290,339,961.42/70,553.80
  6. Step 6: Final answer
    x = 46,635.90

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Similar ratio
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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.