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Finding the Fourth Proportional to 127,879.20, 192,020.40 and 75,328.80

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Solution

The fourth proportional to 127,879.20, 192,020.40 and 75,328.80 is: 113,111.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,879.20 : 192,020.40 = 75,328.80 : x
  2. Step 2: Convert to fraction form
    127,879.20/192,020.40 = 75,328.80/x
  3. Step 3: Cross multiply
    127,879.20x = 192,020.40 × 75,328.80
  4. Step 4: Simplify right side
    127,879.20x = 14,464,666,307.52
  5. Step 5: Solve for x
    x = 14,464,666,307.52/127,879.20
  6. Step 6: Final answer
    x = 113,111.95

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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.