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Finding the Fourth Proportional to 65,813.05, 98,719.49 and 21,439.73

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Solution

The fourth proportional to 65,813.05, 98,719.49 and 21,439.73 is: 32,159.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,813.05 : 98,719.49 = 21,439.73 : x
  2. Step 2: Convert to fraction form
    65,813.05/98,719.49 = 21,439.73/x
  3. Step 3: Cross multiply
    65,813.05x = 98,719.49 × 21,439.73
  4. Step 4: Simplify right side
    65,813.05x = 2,116,519,211.34
  5. Step 5: Solve for x
    x = 2,116,519,211.34/65,813.05
  6. Step 6: Final answer
    x = 32,159.57

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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.