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Finding the Fourth Proportional to 76,996.40, 115,408.20 and 43,732.40

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Solution

The fourth proportional to 76,996.40, 115,408.20 and 43,732.40 is: 65,549.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,996.40 : 115,408.20 = 43,732.40 : x
  2. Step 2: Convert to fraction form
    76,996.40/115,408.20 = 43,732.40/x
  3. Step 3: Cross multiply
    76,996.40x = 115,408.20 × 43,732.40
  4. Step 4: Simplify right side
    76,996.40x = 5,047,077,565.68
  5. Step 5: Solve for x
    x = 5,047,077,565.68/76,996.40
  6. Step 6: Final answer
    x = 65,549.53

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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.