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Finding the Fourth Proportional to 70,575.60, 105,863.40 and 31,090.80

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Solution

The fourth proportional to 70,575.60, 105,863.40 and 31,090.80 is: 46,636.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,575.60 : 105,863.40 = 31,090.80 : x
  2. Step 2: Convert to fraction form
    70,575.60/105,863.40 = 31,090.80/x
  3. Step 3: Cross multiply
    70,575.60x = 105,863.40 × 31,090.80
  4. Step 4: Simplify right side
    70,575.60x = 3,291,377,796.72
  5. Step 5: Solve for x
    x = 3,291,377,796.72/70,575.60
  6. Step 6: Final answer
    x = 46,636.20

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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.