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Finding the Fourth Proportional to 281,160.74, 421,740.76 and 91,620.81

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Solution

The fourth proportional to 281,160.74, 421,740.76 and 91,620.81 is: 137,431.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,160.74 : 421,740.76 = 91,620.81 : x
  2. Step 2: Convert to fraction form
    281,160.74/421,740.76 = 91,620.81/x
  3. Step 3: Cross multiply
    281,160.74x = 421,740.76 × 91,620.81
  4. Step 4: Simplify right side
    281,160.74x = 38,640,230,041.22
  5. Step 5: Solve for x
    x = 38,640,230,041.22/281,160.74
  6. Step 6: Final answer
    x = 137,431.10

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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.