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Finding the Fourth Proportional to 120,387.93, 180,483.33 and 45,465.54

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Solution

The fourth proportional to 120,387.93, 180,483.33 and 45,465.54 is: 68,161.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,387.93 : 180,483.33 = 45,465.54 : x
  2. Step 2: Convert to fraction form
    120,387.93/180,483.33 = 45,465.54/x
  3. Step 3: Cross multiply
    120,387.93x = 180,483.33 × 45,465.54
  4. Step 4: Simplify right side
    120,387.93x = 8,205,772,059.45
  5. Step 5: Solve for x
    x = 8,205,772,059.45/120,387.93
  6. Step 6: Final answer
    x = 68,161.09

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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.