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Finding the Fourth Proportional to 161,884.40, 242,826.60 and 128,423.30

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Solution

The fourth proportional to 161,884.40, 242,826.60 and 128,423.30 is: 192,634.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,884.40 : 242,826.60 = 128,423.30 : x
  2. Step 2: Convert to fraction form
    161,884.40/242,826.60 = 128,423.30/x
  3. Step 3: Cross multiply
    161,884.40x = 242,826.60 × 128,423.30
  4. Step 4: Simplify right side
    161,884.40x = 31,184,593,299.78
  5. Step 5: Solve for x
    x = 31,184,593,299.78/161,884.40
  6. Step 6: Final answer
    x = 192,634.95

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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.