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Finding the Fourth Proportional to 248,420.45, 372,636.79 and 90,648.86

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Solution

The fourth proportional to 248,420.45, 372,636.79 and 90,648.86 is: 135,975.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,420.45 : 372,636.79 = 90,648.86 : x
  2. Step 2: Convert to fraction form
    248,420.45/372,636.79 = 90,648.86/x
  3. Step 3: Cross multiply
    248,420.45x = 372,636.79 × 90,648.86
  4. Step 4: Simplify right side
    248,420.45x = 33,779,098,117.75
  5. Step 5: Solve for x
    x = 33,779,098,117.75/248,420.45
  6. Step 6: Final answer
    x = 135,975.51

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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.