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Finding the Fourth Proportional to 260,036.51, 390,103.01 and 82,495.55

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Solution

The fourth proportional to 260,036.51, 390,103.01 and 82,495.55 is: 123,758.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,036.51 : 390,103.01 = 82,495.55 : x
  2. Step 2: Convert to fraction form
    260,036.51/390,103.01 = 82,495.55/x
  3. Step 3: Cross multiply
    260,036.51x = 390,103.01 × 82,495.55
  4. Step 4: Simplify right side
    260,036.51x = 32,181,761,954.13
  5. Step 5: Solve for x
    x = 32,181,761,954.13/260,036.51
  6. Step 6: Final answer
    x = 123,758.63

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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.