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Finding the Fourth Proportional to 129,879.54, 195,041.64 and 80,254.08

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Solution

The fourth proportional to 129,879.54, 195,041.64 and 80,254.08 is: 120,518.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,879.54 : 195,041.64 = 80,254.08 : x
  2. Step 2: Convert to fraction form
    129,879.54/195,041.64 = 80,254.08/x
  3. Step 3: Cross multiply
    129,879.54x = 195,041.64 × 80,254.08
  4. Step 4: Simplify right side
    129,879.54x = 15,652,887,379.89
  5. Step 5: Solve for x
    x = 15,652,887,379.89/129,879.54
  6. Step 6: Final answer
    x = 120,518.50

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1.5x scale

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.