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Finding the Fourth Proportional to 146,007.40, 201,489.78 and 78,939.40

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Solution

The fourth proportional to 146,007.40, 201,489.78 and 78,939.40 is: 108,936.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,007.40 : 201,489.78 = 78,939.40 : x
  2. Step 2: Convert to fraction form
    146,007.40/201,489.78 = 78,939.40/x
  3. Step 3: Cross multiply
    146,007.40x = 201,489.78 × 78,939.40
  4. Step 4: Simplify right side
    146,007.40x = 15,905,482,339.33
  5. Step 5: Solve for x
    x = 15,905,482,339.33/146,007.40
  6. Step 6: Final answer
    x = 108,936.14

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1.5x scale

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.