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Finding the Fourth Proportional to 140,662.46, 210,987.20 and 40,820.64

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Solution

The fourth proportional to 140,662.46, 210,987.20 and 40,820.64 is: 61,229.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,662.46 : 210,987.20 = 40,820.64 : x
  2. Step 2: Convert to fraction form
    140,662.46/210,987.20 = 40,820.64/x
  3. Step 3: Cross multiply
    140,662.46x = 210,987.20 × 40,820.64
  4. Step 4: Simplify right side
    140,662.46x = 8,612,632,331.70
  5. Step 5: Solve for x
    x = 8,612,632,331.70/140,662.46
  6. Step 6: Final answer
    x = 61,229.08

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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.