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Finding the Fourth Proportional to 134,778.60, 201,949.20 and 84,769.20

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Solution

The fourth proportional to 134,778.60, 201,949.20 and 84,769.20 is: 127,016.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,778.60 : 201,949.20 = 84,769.20 : x
  2. Step 2: Convert to fraction form
    134,778.60/201,949.20 = 84,769.20/x
  3. Step 3: Cross multiply
    134,778.60x = 201,949.20 × 84,769.20
  4. Step 4: Simplify right side
    134,778.60x = 17,119,072,124.64
  5. Step 5: Solve for x
    x = 17,119,072,124.64/134,778.60
  6. Step 6: Final answer
    x = 127,016.25

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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.