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Finding the Fourth Proportional to 214,139.40, 321,063.30 and 80,999.70

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Solution

The fourth proportional to 214,139.40, 321,063.30 and 80,999.70 is: 121,444.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,139.40 : 321,063.30 = 80,999.70 : x
  2. Step 2: Convert to fraction form
    214,139.40/321,063.30 = 80,999.70/x
  3. Step 3: Cross multiply
    214,139.40x = 321,063.30 × 80,999.70
  4. Step 4: Simplify right side
    214,139.40x = 26,006,030,981.01
  5. Step 5: Solve for x
    x = 26,006,030,981.01/214,139.40
  6. Step 6: Final answer
    x = 121,444.40

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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.