Home / 77,286.40-115,929.60-75,731.20

Finding the Fourth Proportional to 77,286.40, 115,929.60 and 75,731.20

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Solution

The fourth proportional to 77,286.40, 115,929.60 and 75,731.20 is: 113,596.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,286.40 : 115,929.60 = 75,731.20 : x
  2. Step 2: Convert to fraction form
    77,286.40/115,929.60 = 75,731.20/x
  3. Step 3: Cross multiply
    77,286.40x = 115,929.60 × 75,731.20
  4. Step 4: Simplify right side
    77,286.40x = 8,779,487,723.52
  5. Step 5: Solve for x
    x = 8,779,487,723.52/77,286.40
  6. Step 6: Final answer
    x = 113,596.80

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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.