Home / 85,109.39-127,636.64-28,172.67

Finding the Fourth Proportional to 85,109.39, 127,636.64 and 28,172.67

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Solution

The fourth proportional to 85,109.39, 127,636.64 and 28,172.67 is: 42,249.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,109.39 : 127,636.64 = 28,172.67 : x
  2. Step 2: Convert to fraction form
    85,109.39/127,636.64 = 28,172.67/x
  3. Step 3: Cross multiply
    85,109.39x = 127,636.64 × 28,172.67
  4. Step 4: Simplify right side
    85,109.39x = 3,595,864,938.63
  5. Step 5: Solve for x
    x = 3,595,864,938.63/85,109.39
  6. Step 6: Final answer
    x = 42,249.92

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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.