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Finding the Fourth Proportional to 214,491.40, 321,639.90 and 81,327.40

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Solution

The fourth proportional to 214,491.40, 321,639.90 and 81,327.40 is: 121,954.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,491.40 : 321,639.90 = 81,327.40 : x
  2. Step 2: Convert to fraction form
    214,491.40/321,639.90 = 81,327.40/x
  3. Step 3: Cross multiply
    214,491.40x = 321,639.90 × 81,327.40
  4. Step 4: Simplify right side
    214,491.40x = 26,158,136,803.26
  5. Step 5: Solve for x
    x = 26,158,136,803.26/214,491.40
  6. Step 6: Final answer
    x = 121,954.25

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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.