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Finding the Fourth Proportional to 161,790.60, 242,685.90 and 82,878.60

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Solution

The fourth proportional to 161,790.60, 242,685.90 and 82,878.60 is: 124,317.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,790.60 : 242,685.90 = 82,878.60 : x
  2. Step 2: Convert to fraction form
    161,790.60/242,685.90 = 82,878.60/x
  3. Step 3: Cross multiply
    161,790.60x = 242,685.90 × 82,878.60
  4. Step 4: Simplify right side
    161,790.60x = 20,113,467,631.74
  5. Step 5: Solve for x
    x = 20,113,467,631.74/161,790.60
  6. Step 6: Final answer
    x = 124,317.90

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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.