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Finding the Fourth Proportional to 136,783.60, 205,060.20 and 71,119.60

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Solution

The fourth proportional to 136,783.60, 205,060.20 and 71,119.60 is: 106,619.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,783.60 : 205,060.20 = 71,119.60 : x
  2. Step 2: Convert to fraction form
    136,783.60/205,060.20 = 71,119.60/x
  3. Step 3: Cross multiply
    136,783.60x = 205,060.20 × 71,119.60
  4. Step 4: Simplify right side
    136,783.60x = 14,583,799,399.92
  5. Step 5: Solve for x
    x = 14,583,799,399.92/136,783.60
  6. Step 6: Final answer
    x = 106,619.50

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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.