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Finding the Fourth Proportional to 121,319,085.60, 181,978,628.40 and 80,504,416.80

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Solution

The fourth proportional to 121,319,085.60, 181,978,628.40 and 80,504,416.80 is: 120,756,625.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,319,085.60 : 181,978,628.40 = 80,504,416.80 : x
  2. Step 2: Convert to fraction form
    121,319,085.60/181,978,628.40 = 80,504,416.80/x
  3. Step 3: Cross multiply
    121,319,085.60x = 181,978,628.40 × 80,504,416.80
  4. Step 4: Simplify right side
    121,319,085.60x = 14,650,083,349,405,918
  5. Step 5: Solve for x
    x = 14,650,083,349,405,918/121,319,085.60
  6. Step 6: Final answer
    x = 120,756,625.20

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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.