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Finding the Fourth Proportional to 258,329.70, 387,522.81 and 87,674.60

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Solution

The fourth proportional to 258,329.70, 387,522.81 and 87,674.60 is: 131,521.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,329.70 : 387,522.81 = 87,674.60 : x
  2. Step 2: Convert to fraction form
    258,329.70/387,522.81 = 87,674.60/x
  3. Step 3: Cross multiply
    258,329.70x = 387,522.81 × 87,674.60
  4. Step 4: Simplify right side
    258,329.70x = 33,975,908,326.43
  5. Step 5: Solve for x
    x = 33,975,908,326.43/258,329.70
  6. Step 6: Final answer
    x = 131,521.49

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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.