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Finding the Fourth Proportional to 153,940.45, 212,584.53 and 145,553.76

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Solution

The fourth proportional to 153,940.45, 212,584.53 and 145,553.76 is: 201,002.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,940.45 : 212,584.53 = 145,553.76 : x
  2. Step 2: Convert to fraction form
    153,940.45/212,584.53 = 145,553.76/x
  3. Step 3: Cross multiply
    153,940.45x = 212,584.53 × 145,553.76
  4. Step 4: Simplify right side
    153,940.45x = 30,942,478,205.16
  5. Step 5: Solve for x
    x = 30,942,478,205.16/153,940.45
  6. Step 6: Final answer
    x = 201,002.91

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1.5x scale

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.