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Finding the Fourth Proportional to 216,447.77, 324,674.15 and 66,686.87

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Solution

The fourth proportional to 216,447.77, 324,674.15 and 66,686.87 is: 100,031.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,447.77 : 324,674.15 = 66,686.87 : x
  2. Step 2: Convert to fraction form
    216,447.77/324,674.15 = 66,686.87/x
  3. Step 3: Cross multiply
    216,447.77x = 324,674.15 × 66,686.87
  4. Step 4: Simplify right side
    216,447.77x = 21,651,500,876.61
  5. Step 5: Solve for x
    x = 21,651,500,876.61/216,447.77
  6. Step 6: Final answer
    x = 100,031.07

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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.