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Finding the Fourth Proportional to 281,209.32, 388,056.42 and 153,890.28

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Solution

The fourth proportional to 281,209.32, 388,056.42 and 153,890.28 is: 212,361.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,209.32 : 388,056.42 = 153,890.28 : x
  2. Step 2: Convert to fraction form
    281,209.32/388,056.42 = 153,890.28/x
  3. Step 3: Cross multiply
    281,209.32x = 388,056.42 × 153,890.28
  4. Step 4: Simplify right side
    281,209.32x = 59,718,111,129.60
  5. Step 5: Solve for x
    x = 59,718,111,129.60/281,209.32
  6. Step 6: Final answer
    x = 212,361.78

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.