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Finding the Fourth Proportional to 71,235.84, 106,859.88 and 18,645.24

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Solution

The fourth proportional to 71,235.84, 106,859.88 and 18,645.24 is: 27,969.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,235.84 : 106,859.88 = 18,645.24 : x
  2. Step 2: Convert to fraction form
    71,235.84/106,859.88 = 18,645.24/x
  3. Step 3: Cross multiply
    71,235.84x = 106,859.88 × 18,645.24
  4. Step 4: Simplify right side
    71,235.84x = 1,992,428,108.97
  5. Step 5: Solve for x
    x = 1,992,428,108.97/71,235.84
  6. Step 6: Final answer
    x = 27,969.46

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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.