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Finding the Fourth Proportional to 121,327,569.60, 181,991,354.40 and 80,512,900.80

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Solution

The fourth proportional to 121,327,569.60, 181,991,354.40 and 80,512,900.80 is: 120,769,351.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,327,569.60 : 181,991,354.40 = 80,512,900.80 : x
  2. Step 2: Convert to fraction form
    121,327,569.60/181,991,354.40 = 80,512,900.80/x
  3. Step 3: Cross multiply
    121,327,569.60x = 181,991,354.40 × 80,512,900.80
  4. Step 4: Simplify right side
    121,327,569.60x = 14,652,651,863,264,844
  5. Step 5: Solve for x
    x = 14,652,651,863,264,844/121,327,569.60
  6. Step 6: Final answer
    x = 120,769,351.20

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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.