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Finding the Fourth Proportional to 248,108.40, 372,308.40 and 90,352.80

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Solution

The fourth proportional to 248,108.40, 372,308.40 and 90,352.80 is: 135,582.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,108.40 : 372,308.40 = 90,352.80 : x
  2. Step 2: Convert to fraction form
    248,108.40/372,308.40 = 90,352.80/x
  3. Step 3: Cross multiply
    248,108.40x = 372,308.40 × 90,352.80
  4. Step 4: Simplify right side
    248,108.40x = 33,639,106,403.52
  5. Step 5: Solve for x
    x = 33,639,106,403.52/248,108.40
  6. Step 6: Final answer
    x = 135,582.30

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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.