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Finding the Fourth Proportional to 144,144.56, 198,790.44 and 90,435.44

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Solution

The fourth proportional to 144,144.56, 198,790.44 and 90,435.44 is: 124,719.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,144.56 : 198,790.44 = 90,435.44 : x
  2. Step 2: Convert to fraction form
    144,144.56/198,790.44 = 90,435.44/x
  3. Step 3: Cross multiply
    144,144.56x = 198,790.44 × 90,435.44
  4. Step 4: Simplify right side
    144,144.56x = 17,977,700,909.19
  5. Step 5: Solve for x
    x = 17,977,700,909.19/144,144.56
  6. Step 6: Final answer
    x = 124,719.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.