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Finding the Fourth Proportional to 260,090.40, 390,135.60 and 73,101.90

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Solution

The fourth proportional to 260,090.40, 390,135.60 and 73,101.90 is: 109,652.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,090.40 : 390,135.60 = 73,101.90 : x
  2. Step 2: Convert to fraction form
    260,090.40/390,135.60 = 73,101.90/x
  3. Step 3: Cross multiply
    260,090.40x = 390,135.60 × 73,101.90
  4. Step 4: Simplify right side
    260,090.40x = 28,519,653,617.64
  5. Step 5: Solve for x
    x = 28,519,653,617.64/260,090.40
  6. Step 6: Final answer
    x = 109,652.85

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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.