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Finding the Fourth Proportional to 281,010.60, 421,515.90 and 91,488.83

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Solution

The fourth proportional to 281,010.60, 421,515.90 and 91,488.83 is: 137,233.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,010.60 : 421,515.90 = 91,488.83 : x
  2. Step 2: Convert to fraction form
    281,010.60/421,515.90 = 91,488.83/x
  3. Step 3: Cross multiply
    281,010.60x = 421,515.90 × 91,488.83
  4. Step 4: Simplify right side
    281,010.60x = 38,563,994,409.82
  5. Step 5: Solve for x
    x = 38,563,994,409.82/281,010.60
  6. Step 6: Final answer
    x = 137,233.24

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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.