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Finding the Fourth Proportional to 85,388.99, 128,097.25 and 32,085.11

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Solution

The fourth proportional to 85,388.99, 128,097.25 and 32,085.11 is: 48,132.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,388.99 : 128,097.25 = 32,085.11 : x
  2. Step 2: Convert to fraction form
    85,388.99/128,097.25 = 32,085.11/x
  3. Step 3: Cross multiply
    85,388.99x = 128,097.25 × 32,085.11
  4. Step 4: Simplify right side
    85,388.99x = 4,110,014,596.98
  5. Step 5: Solve for x
    x = 4,110,014,596.98/85,388.99
  6. Step 6: Final answer
    x = 48,132.84

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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.