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Finding the Fourth Proportional to 170,230.10, 255,345.15 and 81,656.60

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Solution

The fourth proportional to 170,230.10, 255,345.15 and 81,656.60 is: 122,484.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,230.10 : 255,345.15 = 81,656.60 : x
  2. Step 2: Convert to fraction form
    170,230.10/255,345.15 = 81,656.60/x
  3. Step 3: Cross multiply
    170,230.10x = 255,345.15 × 81,656.60
  4. Step 4: Simplify right side
    170,230.10x = 20,850,616,775.49
  5. Step 5: Solve for x
    x = 20,850,616,775.49/170,230.10
  6. Step 6: Final answer
    x = 122,484.90

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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.