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Finding the Fourth Proportional to 120,930.40, 181,395.60 and 83,605.60

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Solution

The fourth proportional to 120,930.40, 181,395.60 and 83,605.60 is: 125,408.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,930.40 : 181,395.60 = 83,605.60 : x
  2. Step 2: Convert to fraction form
    120,930.40/181,395.60 = 83,605.60/x
  3. Step 3: Cross multiply
    120,930.40x = 181,395.60 × 83,605.60
  4. Step 4: Simplify right side
    120,930.40x = 15,165,687,975.36
  5. Step 5: Solve for x
    x = 15,165,687,975.36/120,930.40
  6. Step 6: Final answer
    x = 125,408.40

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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.