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Finding the Fourth Proportional to 161,682,406.80, 242,559,039.60 and 79,840,492.80

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Solution

The fourth proportional to 161,682,406.80, 242,559,039.60 and 79,840,492.80 is: 119,778,234.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,682,406.80 : 242,559,039.60 = 79,840,492.80 : x
  2. Step 2: Convert to fraction form
    161,682,406.80/242,559,039.60 = 79,840,492.80/x
  3. Step 3: Cross multiply
    161,682,406.80x = 242,559,039.60 × 79,840,492.80
  4. Step 4: Simplify right side
    161,682,406.80x = 19,366,033,254,758,712
  5. Step 5: Solve for x
    x = 19,366,033,254,758,712/161,682,406.80
  6. Step 6: Final answer
    x = 119,778,234.61

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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.