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Finding the Fourth Proportional to 216,457.84, 324,686.76 and 131,085.90

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Solution

The fourth proportional to 216,457.84, 324,686.76 and 131,085.90 is: 196,628.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,457.84 : 324,686.76 = 131,085.90 : x
  2. Step 2: Convert to fraction form
    216,457.84/324,686.76 = 131,085.90/x
  3. Step 3: Cross multiply
    216,457.84x = 324,686.76 × 131,085.90
  4. Step 4: Simplify right side
    216,457.84x = 42,561,856,152.68
  5. Step 5: Solve for x
    x = 42,561,856,152.68/216,457.84
  6. Step 6: Final answer
    x = 196,628.85

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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.