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Finding the Fourth Proportional to 342,781.93, 514,220.78 and 143,056.59

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Solution

The fourth proportional to 342,781.93, 514,220.78 and 143,056.59 is: 214,604.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,781.93 : 514,220.78 = 143,056.59 : x
  2. Step 2: Convert to fraction form
    342,781.93/514,220.78 = 143,056.59/x
  3. Step 3: Cross multiply
    342,781.93x = 514,220.78 × 143,056.59
  4. Step 4: Simplify right side
    342,781.93x = 73,562,668,007.55
  5. Step 5: Solve for x
    x = 73,562,668,007.55/342,781.93
  6. Step 6: Final answer
    x = 214,604.86

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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.