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Finding the Fourth Proportional to 192,647.40, 288,884.70 and 87,412.20

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Solution

The fourth proportional to 192,647.40, 288,884.70 and 87,412.20 is: 131,079.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,647.40 : 288,884.70 = 87,412.20 : x
  2. Step 2: Convert to fraction form
    192,647.40/288,884.70 = 87,412.20/x
  3. Step 3: Cross multiply
    192,647.40x = 288,884.70 × 87,412.20
  4. Step 4: Simplify right side
    192,647.40x = 25,252,047,173.34
  5. Step 5: Solve for x
    x = 25,252,047,173.34/192,647.40
  6. Step 6: Final answer
    x = 131,079.10

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1.5x scale

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.