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Finding the Fourth Proportional to 75,215.70, 112,825.61 and 21,905.55

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Solution

The fourth proportional to 75,215.70, 112,825.61 and 21,905.55 is: 32,858.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,215.70 : 112,825.61 = 21,905.55 : x
  2. Step 2: Convert to fraction form
    75,215.70/112,825.61 = 21,905.55/x
  3. Step 3: Cross multiply
    75,215.70x = 112,825.61 × 21,905.55
  4. Step 4: Simplify right side
    75,215.70x = 2,471,507,041.14
  5. Step 5: Solve for x
    x = 2,471,507,041.14/75,215.70
  6. Step 6: Final answer
    x = 32,858.92

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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.