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Finding the Fourth Proportional to 76,987.40, 115,464.90 and 32,615.60

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Solution

The fourth proportional to 76,987.40, 115,464.90 and 32,615.60 is: 48,916.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,987.40 : 115,464.90 = 32,615.60 : x
  2. Step 2: Convert to fraction form
    76,987.40/115,464.90 = 32,615.60/x
  3. Step 3: Cross multiply
    76,987.40x = 115,464.90 × 32,615.60
  4. Step 4: Simplify right side
    76,987.40x = 3,765,956,992.44
  5. Step 5: Solve for x
    x = 3,765,956,992.44/76,987.40
  6. Step 6: Final answer
    x = 48,916.54

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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.