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Finding the Fourth Proportional to 216,856.50, 299,446.65 and 136,418.64

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Solution

The fourth proportional to 216,856.50, 299,446.65 and 136,418.64 is: 188,373.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,856.50 : 299,446.65 = 136,418.64 : x
  2. Step 2: Convert to fraction form
    216,856.50/299,446.65 = 136,418.64/x
  3. Step 3: Cross multiply
    216,856.50x = 299,446.65 × 136,418.64
  4. Step 4: Simplify right side
    216,856.50x = 40,850,104,745.56
  5. Step 5: Solve for x
    x = 40,850,104,745.56/216,856.50
  6. Step 6: Final answer
    x = 188,373.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.