Home / 76,815.60-115,223.40-47,137.20

Finding the Fourth Proportional to 76,815.60, 115,223.40 and 47,137.20

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Solution

The fourth proportional to 76,815.60, 115,223.40 and 47,137.20 is: 70,705.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,815.60 : 115,223.40 = 47,137.20 : x
  2. Step 2: Convert to fraction form
    76,815.60/115,223.40 = 47,137.20/x
  3. Step 3: Cross multiply
    76,815.60x = 115,223.40 × 47,137.20
  4. Step 4: Simplify right side
    76,815.60x = 5,431,308,450.48
  5. Step 5: Solve for x
    x = 5,431,308,450.48/76,815.60
  6. Step 6: Final answer
    x = 70,705.80

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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.