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Finding the Fourth Proportional to 203,187.40, 304,817.55 and 84,870.70

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Solution

The fourth proportional to 203,187.40, 304,817.55 and 84,870.70 is: 127,321.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,187.40 : 304,817.55 = 84,870.70 : x
  2. Step 2: Convert to fraction form
    203,187.40/304,817.55 = 84,870.70/x
  3. Step 3: Cross multiply
    203,187.40x = 304,817.55 × 84,870.70
  4. Step 4: Simplify right side
    203,187.40x = 25,870,078,840.79
  5. Step 5: Solve for x
    x = 25,870,078,840.79/203,187.40
  6. Step 6: Final answer
    x = 127,321.28

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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.