Home / 81,260.40-121,962.60-47,938.80

Finding the Fourth Proportional to 81,260.40, 121,962.60 and 47,938.80

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Solution

The fourth proportional to 81,260.40, 121,962.60 and 47,938.80 is: 71,950.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,260.40 : 121,962.60 = 47,938.80 : x
  2. Step 2: Convert to fraction form
    81,260.40/121,962.60 = 47,938.80/x
  3. Step 3: Cross multiply
    81,260.40x = 121,962.60 × 47,938.80
  4. Step 4: Simplify right side
    81,260.40x = 5,846,740,688.88
  5. Step 5: Solve for x
    x = 5,846,740,688.88/81,260.40
  6. Step 6: Final answer
    x = 71,950.68

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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.