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Finding the Fourth Proportional to 281,162.39, 421,700.28 and 91,622.29

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Solution

The fourth proportional to 281,162.39, 421,700.28 and 91,622.29 is: 137,419.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,162.39 : 421,700.28 = 91,622.29 : x
  2. Step 2: Convert to fraction form
    281,162.39/421,700.28 = 91,622.29/x
  3. Step 3: Cross multiply
    281,162.39x = 421,700.28 × 91,622.29
  4. Step 4: Simplify right side
    281,162.39x = 38,637,144,740.09
  5. Step 5: Solve for x
    x = 38,637,144,740.09/281,162.39
  6. Step 6: Final answer
    x = 137,419.32

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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.