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Finding the Fourth Proportional to 192,611.30, 288,911.55 and 87,430.10

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Solution

The fourth proportional to 192,611.30, 288,911.55 and 87,430.10 is: 131,142.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,611.30 : 288,911.55 = 87,430.10 : x
  2. Step 2: Convert to fraction form
    192,611.30/288,911.55 = 87,430.10/x
  3. Step 3: Cross multiply
    192,611.30x = 288,911.55 × 87,430.10
  4. Step 4: Simplify right side
    192,611.30x = 25,259,565,707.66
  5. Step 5: Solve for x
    x = 25,259,565,707.66/192,611.30
  6. Step 6: Final answer
    x = 131,142.70

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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.