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Finding the Fourth Proportional to 60,808.40, 91,221.72 and 21,358.56

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Solution

The fourth proportional to 60,808.40, 91,221.72 and 21,358.56 is: 32,041.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,808.40 : 91,221.72 = 21,358.56 : x
  2. Step 2: Convert to fraction form
    60,808.40/91,221.72 = 21,358.56/x
  3. Step 3: Cross multiply
    60,808.40x = 91,221.72 × 21,358.56
  4. Step 4: Simplify right side
    60,808.40x = 1,948,364,579.92
  5. Step 5: Solve for x
    x = 1,948,364,579.92/60,808.40
  6. Step 6: Final answer
    x = 32,041.04

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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.