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Finding the Fourth Proportional to 260,129.40, 389,925.72 and 126,844.98

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Solution

The fourth proportional to 260,129.40, 389,925.72 and 126,844.98 is: 190,136.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,129.40 : 389,925.72 = 126,844.98 : x
  2. Step 2: Convert to fraction form
    260,129.40/389,925.72 = 126,844.98/x
  3. Step 3: Cross multiply
    260,129.40x = 389,925.72 × 126,844.98
  4. Step 4: Simplify right side
    260,129.40x = 49,460,120,154.89
  5. Step 5: Solve for x
    x = 49,460,120,154.89/260,129.40
  6. Step 6: Final answer
    x = 190,136.60

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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.