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Finding the Fourth Proportional to 85,955.86, 128,983.99 and 36,032.12

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Solution

The fourth proportional to 85,955.86, 128,983.99 and 36,032.12 is: 54,069.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,955.86 : 128,983.99 = 36,032.12 : x
  2. Step 2: Convert to fraction form
    85,955.86/128,983.99 = 36,032.12/x
  3. Step 3: Cross multiply
    85,955.86x = 128,983.99 × 36,032.12
  4. Step 4: Simplify right side
    85,955.86x = 4,647,566,605.76
  5. Step 5: Solve for x
    x = 4,647,566,605.76/85,955.86
  6. Step 6: Final answer
    x = 54,069.22

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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.