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Finding the Fourth Proportional to 260,040.40, 390,060.60 and 120,072.40

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Solution

The fourth proportional to 260,040.40, 390,060.60 and 120,072.40 is: 180,108.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,040.40 : 390,060.60 = 120,072.40 : x
  2. Step 2: Convert to fraction form
    260,040.40/390,060.60 = 120,072.40/x
  3. Step 3: Cross multiply
    260,040.40x = 390,060.60 × 120,072.40
  4. Step 4: Simplify right side
    260,040.40x = 46,835,512,387.44
  5. Step 5: Solve for x
    x = 46,835,512,387.44/260,040.40
  6. Step 6: Final answer
    x = 180,108.60

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1.5x scale

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.