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Finding the Fourth Proportional to 144,878.40, 217,317.60 and 139,629.60

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Solution

The fourth proportional to 144,878.40, 217,317.60 and 139,629.60 is: 209,444.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,878.40 : 217,317.60 = 139,629.60 : x
  2. Step 2: Convert to fraction form
    144,878.40/217,317.60 = 139,629.60/x
  3. Step 3: Cross multiply
    144,878.40x = 217,317.60 × 139,629.60
  4. Step 4: Simplify right side
    144,878.40x = 30,343,969,560.96
  5. Step 5: Solve for x
    x = 30,343,969,560.96/144,878.40
  6. Step 6: Final answer
    x = 209,444.40

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1.5x scale

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.