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Finding the Fourth Proportional to 216,459.84, 324,689.76 and 131,087.90

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Solution

The fourth proportional to 216,459.84, 324,689.76 and 131,087.90 is: 196,631.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,459.84 : 324,689.76 = 131,087.90 : x
  2. Step 2: Convert to fraction form
    216,459.84/324,689.76 = 131,087.90/x
  3. Step 3: Cross multiply
    216,459.84x = 324,689.76 × 131,087.90
  4. Step 4: Simplify right side
    216,459.84x = 42,562,898,789.90
  5. Step 5: Solve for x
    x = 42,562,898,789.90/216,459.84
  6. Step 6: Final answer
    x = 196,631.85

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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.