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Finding the Fourth Proportional to 242,920.40, 335,230.60 and 135,497.40

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Solution

The fourth proportional to 242,920.40, 335,230.60 and 135,497.40 is: 186,986.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,920.40 : 335,230.60 = 135,497.40 : x
  2. Step 2: Convert to fraction form
    242,920.40/335,230.60 = 135,497.40/x
  3. Step 3: Cross multiply
    242,920.40x = 335,230.60 × 135,497.40
  4. Step 4: Simplify right side
    242,920.40x = 45,422,874,700.44
  5. Step 5: Solve for x
    x = 45,422,874,700.44/242,920.40
  6. Step 6: Final answer
    x = 186,986.66

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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.