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Finding the Fourth Proportional to 65,429.88, 98,144.87 and 21,056.63

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Solution

The fourth proportional to 65,429.88, 98,144.87 and 21,056.63 is: 31,584.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,429.88 : 98,144.87 = 21,056.63 : x
  2. Step 2: Convert to fraction form
    65,429.88/98,144.87 = 21,056.63/x
  3. Step 3: Cross multiply
    65,429.88x = 98,144.87 × 21,056.63
  4. Step 4: Simplify right side
    65,429.88x = 2,066,600,213.99
  5. Step 5: Solve for x
    x = 2,066,600,213.99/65,429.88
  6. Step 6: Final answer
    x = 31,584.96

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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.