Home / 260,114.78-390,172.19-73,126.28

Finding the Fourth Proportional to 260,114.78, 390,172.19 and 73,126.28

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Solution

The fourth proportional to 260,114.78, 390,172.19 and 73,126.28 is: 109,689.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,114.78 : 390,172.19 = 73,126.28 : x
  2. Step 2: Convert to fraction form
    260,114.78/390,172.19 = 73,126.28/x
  3. Step 3: Cross multiply
    260,114.78x = 390,172.19 × 73,126.28
  4. Step 4: Simplify right side
    260,114.78x = 28,531,840,814.15
  5. Step 5: Solve for x
    x = 28,531,840,814.15/260,114.78
  6. Step 6: Final answer
    x = 109,689.43

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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.