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Finding the Fourth Proportional to 133,036.54, 199,547.52 and 80,431.90

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Solution

The fourth proportional to 133,036.54, 199,547.52 and 80,431.90 is: 120,643.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,036.54 : 199,547.52 = 80,431.90 : x
  2. Step 2: Convert to fraction form
    133,036.54/199,547.52 = 80,431.90/x
  3. Step 3: Cross multiply
    133,036.54x = 199,547.52 × 80,431.90
  4. Step 4: Simplify right side
    133,036.54x = 16,049,986,173.89
  5. Step 5: Solve for x
    x = 16,049,986,173.89/133,036.54
  6. Step 6: Final answer
    x = 120,643.44

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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.