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Finding the Fourth Proportional to 85,735.80, 128,623.96 and 35,788.14

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Solution

The fourth proportional to 85,735.80, 128,623.96 and 35,788.14 is: 53,690.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,735.80 : 128,623.96 = 35,788.14 : x
  2. Step 2: Convert to fraction form
    85,735.80/128,623.96 = 35,788.14/x
  3. Step 3: Cross multiply
    85,735.80x = 128,623.96 × 35,788.14
  4. Step 4: Simplify right side
    85,735.80x = 4,603,212,287.83
  5. Step 5: Solve for x
    x = 4,603,212,287.83/85,735.80
  6. Step 6: Final answer
    x = 53,690.67

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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.