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Finding the Fourth Proportional to 136,980.40, 205,470.60 and 89,741.20

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Solution

The fourth proportional to 136,980.40, 205,470.60 and 89,741.20 is: 134,611.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,980.40 : 205,470.60 = 89,741.20 : x
  2. Step 2: Convert to fraction form
    136,980.40/205,470.60 = 89,741.20/x
  3. Step 3: Cross multiply
    136,980.40x = 205,470.60 × 89,741.20
  4. Step 4: Simplify right side
    136,980.40x = 18,439,178,208.72
  5. Step 5: Solve for x
    x = 18,439,178,208.72/136,980.40
  6. Step 6: Final answer
    x = 134,611.80

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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.