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Finding the Fourth Proportional to 140,000.40, 210,000.60 and 87,512.40

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Solution

The fourth proportional to 140,000.40, 210,000.60 and 87,512.40 is: 131,268.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,000.40 : 210,000.60 = 87,512.40 : x
  2. Step 2: Convert to fraction form
    140,000.40/210,000.60 = 87,512.40/x
  3. Step 3: Cross multiply
    140,000.40x = 210,000.60 × 87,512.40
  4. Step 4: Simplify right side
    140,000.40x = 18,377,656,507.44
  5. Step 5: Solve for x
    x = 18,377,656,507.44/140,000.40
  6. Step 6: Final answer
    x = 131,268.60

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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.