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Finding the Fourth Proportional to 120,486.68, 180,483.78 and 56,353.04

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Solution

The fourth proportional to 120,486.68, 180,483.78 and 56,353.04 is: 84,414.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,486.68 : 180,483.78 = 56,353.04 : x
  2. Step 2: Convert to fraction form
    120,486.68/180,483.78 = 56,353.04/x
  3. Step 3: Cross multiply
    120,486.68x = 180,483.78 × 56,353.04
  4. Step 4: Simplify right side
    120,486.68x = 10,170,809,673.69
  5. Step 5: Solve for x
    x = 10,170,809,673.69/120,486.68
  6. Step 6: Final answer
    x = 84,414.39

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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.