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Finding the Fourth Proportional to 281,223.45, 388,086.53 and 153,898.65

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Solution

The fourth proportional to 281,223.45, 388,086.53 and 153,898.65 is: 212,379.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,223.45 : 388,086.53 = 153,898.65 : x
  2. Step 2: Convert to fraction form
    281,223.45/388,086.53 = 153,898.65/x
  3. Step 3: Cross multiply
    281,223.45x = 388,086.53 × 153,898.65
  4. Step 4: Simplify right side
    281,223.45x = 59,725,992,280.69
  5. Step 5: Solve for x
    x = 59,725,992,280.69/281,223.45
  6. Step 6: Final answer
    x = 212,379.13

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Why These Related Problems?

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