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Finding the Fourth Proportional to 203,084.80, 304,166.40 and 128,435.20

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Solution

The fourth proportional to 203,084.80, 304,166.40 and 128,435.20 is: 192,361.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,084.80 : 304,166.40 = 128,435.20 : x
  2. Step 2: Convert to fraction form
    203,084.80/304,166.40 = 128,435.20/x
  3. Step 3: Cross multiply
    203,084.80x = 304,166.40 × 128,435.20
  4. Step 4: Simplify right side
    203,084.80x = 39,065,672,417.28
  5. Step 5: Solve for x
    x = 39,065,672,417.28/203,084.80
  6. Step 6: Final answer
    x = 192,361.38

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1.5x scale

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.