Home / 259,816.38-389,680.65-72,784.86

Finding the Fourth Proportional to 259,816.38, 389,680.65 and 72,784.86

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Solution

The fourth proportional to 259,816.38, 389,680.65 and 72,784.86 is: 109,164.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,816.38 : 389,680.65 = 72,784.86 : x
  2. Step 2: Convert to fraction form
    259,816.38/389,680.65 = 72,784.86/x
  3. Step 3: Cross multiply
    259,816.38x = 389,680.65 × 72,784.86
  4. Step 4: Simplify right side
    259,816.38x = 28,362,851,554.96
  5. Step 5: Solve for x
    x = 28,362,851,554.96/259,816.38
  6. Step 6: Final answer
    x = 109,164.99

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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.