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Finding the Fourth Proportional to 140,002.40, 210,003.60 and 61,270.40

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Solution

The fourth proportional to 140,002.40, 210,003.60 and 61,270.40 is: 91,905.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,002.40 : 210,003.60 = 61,270.40 : x
  2. Step 2: Convert to fraction form
    140,002.40/210,003.60 = 61,270.40/x
  3. Step 3: Cross multiply
    140,002.40x = 210,003.60 × 61,270.40
  4. Step 4: Simplify right side
    140,002.40x = 12,867,004,573.44
  5. Step 5: Solve for x
    x = 12,867,004,573.44/140,002.40
  6. Step 6: Final answer
    x = 91,905.60

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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.