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Finding the Fourth Proportional to 258,980.72, 388,523.93 and 109,220.74

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Solution

The fourth proportional to 258,980.72, 388,523.93 and 109,220.74 is: 163,853.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,980.72 : 388,523.93 = 109,220.74 : x
  2. Step 2: Convert to fraction form
    258,980.72/388,523.93 = 109,220.74/x
  3. Step 3: Cross multiply
    258,980.72x = 388,523.93 × 109,220.74
  4. Step 4: Simplify right side
    258,980.72x = 42,434,869,624.89
  5. Step 5: Solve for x
    x = 42,434,869,624.89/258,980.72
  6. Step 6: Final answer
    x = 163,853.40

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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.