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Finding the Fourth Proportional to 192,615.20, 288,728.40 and 87,509.60

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Solution

The fourth proportional to 192,615.20, 288,728.40 and 87,509.60 is: 131,176.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,615.20 : 288,728.40 = 87,509.60 : x
  2. Step 2: Convert to fraction form
    192,615.20/288,728.40 = 87,509.60/x
  3. Step 3: Cross multiply
    192,615.20x = 288,728.40 × 87,509.60
  4. Step 4: Simplify right side
    192,615.20x = 25,266,506,792.64
  5. Step 5: Solve for x
    x = 25,266,506,792.64/192,615.20
  6. Step 6: Final answer
    x = 131,176.08

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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.