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Finding the Fourth Proportional to 140,736.20, 210,809.90 and 65,920.20

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Solution

The fourth proportional to 140,736.20, 210,809.90 and 65,920.20 is: 98,742.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,736.20 : 210,809.90 = 65,920.20 : x
  2. Step 2: Convert to fraction form
    140,736.20/210,809.90 = 65,920.20/x
  3. Step 3: Cross multiply
    140,736.20x = 210,809.90 × 65,920.20
  4. Step 4: Simplify right side
    140,736.20x = 13,896,630,769.98
  5. Step 5: Solve for x
    x = 13,896,630,769.98/140,736.20
  6. Step 6: Final answer
    x = 98,742.40

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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.