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Finding the Fourth Proportional to 260,485.80, 390,775.52 and 92,103.88

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Solution

The fourth proportional to 260,485.80, 390,775.52 and 92,103.88 is: 138,172.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,485.80 : 390,775.52 = 92,103.88 : x
  2. Step 2: Convert to fraction form
    260,485.80/390,775.52 = 92,103.88/x
  3. Step 3: Cross multiply
    260,485.80x = 390,775.52 × 92,103.88
  4. Step 4: Simplify right side
    260,485.80x = 35,991,941,601.02
  5. Step 5: Solve for x
    x = 35,991,941,601.02/260,485.80
  6. Step 6: Final answer
    x = 138,172.37

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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.