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Finding the Fourth Proportional to 252,136.80, 377,962.20 and 145,411.20

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Solution

The fourth proportional to 252,136.80, 377,962.20 and 145,411.20 is: 217,976.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,136.80 : 377,962.20 = 145,411.20 : x
  2. Step 2: Convert to fraction form
    252,136.80/377,962.20 = 145,411.20/x
  3. Step 3: Cross multiply
    252,136.80x = 377,962.20 × 145,411.20
  4. Step 4: Simplify right side
    252,136.80x = 54,959,937,056.64
  5. Step 5: Solve for x
    x = 54,959,937,056.64/252,136.80
  6. Step 6: Final answer
    x = 217,976.66

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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.