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Finding the Fourth Proportional to 165,801.20, 248,788.20 and 72,316.40

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Solution

The fourth proportional to 165,801.20, 248,788.20 and 72,316.40 is: 108,512.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,801.20 : 248,788.20 = 72,316.40 : x
  2. Step 2: Convert to fraction form
    165,801.20/248,788.20 = 72,316.40/x
  3. Step 3: Cross multiply
    165,801.20x = 248,788.20 × 72,316.40
  4. Step 4: Simplify right side
    165,801.20x = 17,991,466,986.48
  5. Step 5: Solve for x
    x = 17,991,466,986.48/165,801.20
  6. Step 6: Final answer
    x = 108,512.28

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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.