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Finding the Fourth Proportional to 242,628.40, 363,942.60 and 84,840.40

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Solution

The fourth proportional to 242,628.40, 363,942.60 and 84,840.40 is: 127,260.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,628.40 : 363,942.60 = 84,840.40 : x
  2. Step 2: Convert to fraction form
    242,628.40/363,942.60 = 84,840.40/x
  3. Step 3: Cross multiply
    242,628.40x = 363,942.60 × 84,840.40
  4. Step 4: Simplify right side
    242,628.40x = 30,877,035,761.04
  5. Step 5: Solve for x
    x = 30,877,035,761.04/242,628.40
  6. Step 6: Final answer
    x = 127,260.60

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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.