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Finding the Fourth Proportional to 281,079.65, 421,649.01 and 91,554.79

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Solution

The fourth proportional to 281,079.65, 421,649.01 and 91,554.79 is: 137,341.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,079.65 : 421,649.01 = 91,554.79 : x
  2. Step 2: Convert to fraction form
    281,079.65/421,649.01 = 91,554.79/x
  3. Step 3: Cross multiply
    281,079.65x = 421,649.01 × 91,554.79
  4. Step 4: Simplify right side
    281,079.65x = 38,603,986,564.26
  5. Step 5: Solve for x
    x = 38,603,986,564.26/281,079.65
  6. Step 6: Final answer
    x = 137,341.81

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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.