Home / 203,215.40-304,495.05-128,201.30

Finding the Fourth Proportional to 203,215.40, 304,495.05 and 128,201.30

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Solution

The fourth proportional to 203,215.40, 304,495.05 and 128,201.30 is: 192,095.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,215.40 : 304,495.05 = 128,201.30 : x
  2. Step 2: Convert to fraction form
    203,215.40/304,495.05 = 128,201.30/x
  3. Step 3: Cross multiply
    203,215.40x = 304,495.05 × 128,201.30
  4. Step 4: Simplify right side
    203,215.40x = 39,036,661,253.57
  5. Step 5: Solve for x
    x = 39,036,661,253.57/203,215.40
  6. Step 6: Final answer
    x = 192,095.00

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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.