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Finding the Fourth Proportional to 192,490.64, 288,779.64 and 87,339.68

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Solution

The fourth proportional to 192,490.64, 288,779.64 and 87,339.68 is: 131,029.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,490.64 : 288,779.64 = 87,339.68 : x
  2. Step 2: Convert to fraction form
    192,490.64/288,779.64 = 87,339.68/x
  3. Step 3: Cross multiply
    192,490.64x = 288,779.64 × 87,339.68
  4. Step 4: Simplify right side
    192,490.64x = 25,221,921,348.12
  5. Step 5: Solve for x
    x = 25,221,921,348.12/192,490.64
  6. Step 6: Final answer
    x = 131,029.34

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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.