Home / 145,144.38-200,285.55-81,469.74

Finding the Fourth Proportional to 145,144.38, 200,285.55 and 81,469.74

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Solution

The fourth proportional to 145,144.38, 200,285.55 and 81,469.74 is: 112,420.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,144.38 : 200,285.55 = 81,469.74 : x
  2. Step 2: Convert to fraction form
    145,144.38/200,285.55 = 81,469.74/x
  3. Step 3: Cross multiply
    145,144.38x = 200,285.55 × 81,469.74
  4. Step 4: Simplify right side
    145,144.38x = 16,317,211,684.26
  5. Step 5: Solve for x
    x = 16,317,211,684.26/145,144.38
  6. Step 6: Final answer
    x = 112,420.55

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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.