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Finding the Fourth Proportional to 264,090.60, 396,132.30 and 86,603.40

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Solution

The fourth proportional to 264,090.60, 396,132.30 and 86,603.40 is: 129,903.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    264,090.60 : 396,132.30 = 86,603.40 : x
  2. Step 2: Convert to fraction form
    264,090.60/396,132.30 = 86,603.40/x
  3. Step 3: Cross multiply
    264,090.60x = 396,132.30 × 86,603.40
  4. Step 4: Simplify right side
    264,090.60x = 34,306,404,029.82
  5. Step 5: Solve for x
    x = 34,306,404,029.82/264,090.60
  6. Step 6: Final answer
    x = 129,903.92

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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.