Home / 76,811.60-115,217.40-47,133.20

Finding the Fourth Proportional to 76,811.60, 115,217.40 and 47,133.20

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Solution

The fourth proportional to 76,811.60, 115,217.40 and 47,133.20 is: 70,699.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,811.60 : 115,217.40 = 47,133.20 : x
  2. Step 2: Convert to fraction form
    76,811.60/115,217.40 = 47,133.20/x
  3. Step 3: Cross multiply
    76,811.60x = 115,217.40 × 47,133.20
  4. Step 4: Simplify right side
    76,811.60x = 5,430,564,757.68
  5. Step 5: Solve for x
    x = 5,430,564,757.68/76,811.60
  6. Step 6: Final answer
    x = 70,699.80

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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.