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Finding the Fourth Proportional to 248,756.40, 373,280.40 and 91,000.80

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Solution

The fourth proportional to 248,756.40, 373,280.40 and 91,000.80 is: 136,554.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,756.40 : 373,280.40 = 91,000.80 : x
  2. Step 2: Convert to fraction form
    248,756.40/373,280.40 = 91,000.80/x
  3. Step 3: Cross multiply
    248,756.40x = 373,280.40 × 91,000.80
  4. Step 4: Simplify right side
    248,756.40x = 33,968,815,024.32
  5. Step 5: Solve for x
    x = 33,968,815,024.32/248,756.40
  6. Step 6: Final answer
    x = 136,554.54

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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.