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Finding the Fourth Proportional to 85,739.16, 128,647.62 and 44,215.32

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Solution

The fourth proportional to 85,739.16, 128,647.62 and 44,215.32 is: 66,343.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,739.16 : 128,647.62 = 44,215.32 : x
  2. Step 2: Convert to fraction form
    85,739.16/128,647.62 = 44,215.32/x
  3. Step 3: Cross multiply
    85,739.16x = 128,647.62 × 44,215.32
  4. Step 4: Simplify right side
    85,739.16x = 5,688,195,685.54
  5. Step 5: Solve for x
    x = 5,688,195,685.54/85,739.16
  6. Step 6: Final answer
    x = 66,343.03

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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.