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Finding the Fourth Proportional to 281,056.80, 421,439.40 and 103,472.40

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Solution

The fourth proportional to 281,056.80, 421,439.40 and 103,472.40 is: 155,154.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,056.80 : 421,439.40 = 103,472.40 : x
  2. Step 2: Convert to fraction form
    281,056.80/421,439.40 = 103,472.40/x
  3. Step 3: Cross multiply
    281,056.80x = 421,439.40 × 103,472.40
  4. Step 4: Simplify right side
    281,056.80x = 43,607,346,172.56
  5. Step 5: Solve for x
    x = 43,607,346,172.56/281,056.80
  6. Step 6: Final answer
    x = 155,154.92

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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.