Home / 91,821.20-137,731.80-25,271.60

Finding the Fourth Proportional to 91,821.20, 137,731.80 and 25,271.60

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Solution

The fourth proportional to 91,821.20, 137,731.80 and 25,271.60 is: 37,907.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,821.20 : 137,731.80 = 25,271.60 : x
  2. Step 2: Convert to fraction form
    91,821.20/137,731.80 = 25,271.60/x
  3. Step 3: Cross multiply
    91,821.20x = 137,731.80 × 25,271.60
  4. Step 4: Simplify right side
    91,821.20x = 3,480,702,956.88
  5. Step 5: Solve for x
    x = 3,480,702,956.88/91,821.20
  6. Step 6: Final answer
    x = 37,907.40

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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.