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Finding the Fourth Proportional to 260,079.81, 390,119.72 and 73,091.31

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Solution

The fourth proportional to 260,079.81, 390,119.72 and 73,091.31 is: 109,636.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,079.81 : 390,119.72 = 73,091.31 : x
  2. Step 2: Convert to fraction form
    260,079.81/390,119.72 = 73,091.31/x
  3. Step 3: Cross multiply
    260,079.81x = 390,119.72 × 73,091.31
  4. Step 4: Simplify right side
    260,079.81x = 28,514,362,366.93
  5. Step 5: Solve for x
    x = 28,514,362,366.93/260,079.81
  6. Step 6: Final answer
    x = 109,636.97

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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.