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Finding the Fourth Proportional to 161,878.40, 243,109.20 and 156,629.60

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Solution

The fourth proportional to 161,878.40, 243,109.20 and 156,629.60 is: 235,226.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,878.40 : 243,109.20 = 156,629.60 : x
  2. Step 2: Convert to fraction form
    161,878.40/243,109.20 = 156,629.60/x
  3. Step 3: Cross multiply
    161,878.40x = 243,109.20 × 156,629.60
  4. Step 4: Simplify right side
    161,878.40x = 38,078,096,752.32
  5. Step 5: Solve for x
    x = 38,078,096,752.32/161,878.40
  6. Step 6: Final answer
    x = 235,226.55

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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.