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Finding the Fourth Proportional to 85,412.40, 128,010.60 and 32,751.60

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Solution

The fourth proportional to 85,412.40, 128,010.60 and 32,751.60 is: 49,085.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,412.40 : 128,010.60 = 32,751.60 : x
  2. Step 2: Convert to fraction form
    85,412.40/128,010.60 = 32,751.60/x
  3. Step 3: Cross multiply
    85,412.40x = 128,010.60 × 32,751.60
  4. Step 4: Simplify right side
    85,412.40x = 4,192,551,966.96
  5. Step 5: Solve for x
    x = 4,192,551,966.96/85,412.40
  6. Step 6: Final answer
    x = 49,085.99

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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.