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Finding the Fourth Proportional to 85,364.30, 128,161.65 and 54,260.30

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Solution

The fourth proportional to 85,364.30, 128,161.65 and 54,260.30 is: 81,463.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,364.30 : 128,161.65 = 54,260.30 : x
  2. Step 2: Convert to fraction form
    85,364.30/128,161.65 = 54,260.30/x
  3. Step 3: Cross multiply
    85,364.30x = 128,161.65 × 54,260.30
  4. Step 4: Simplify right side
    85,364.30x = 6,954,089,577.50
  5. Step 5: Solve for x
    x = 6,954,089,577.50/85,364.30
  6. Step 6: Final answer
    x = 81,463.67

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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.