Home / 145,015.70-200,123.21-80,486.15

Finding the Fourth Proportional to 145,015.70, 200,123.21 and 80,486.15

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Solution

The fourth proportional to 145,015.70, 200,123.21 and 80,486.15 is: 111,071.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,015.70 : 200,123.21 = 80,486.15 : x
  2. Step 2: Convert to fraction form
    145,015.70/200,123.21 = 80,486.15/x
  3. Step 3: Cross multiply
    145,015.70x = 200,123.21 × 80,486.15
  4. Step 4: Simplify right side
    145,015.70x = 16,107,145,295.49
  5. Step 5: Solve for x
    x = 16,107,145,295.49/145,015.70
  6. Step 6: Final answer
    x = 111,071.74

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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.