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Finding the Fourth Proportional to 215,613.60, 323,420.40 and 120,746.40

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Solution

The fourth proportional to 215,613.60, 323,420.40 and 120,746.40 is: 181,119.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,613.60 : 323,420.40 = 120,746.40 : x
  2. Step 2: Convert to fraction form
    215,613.60/323,420.40 = 120,746.40/x
  3. Step 3: Cross multiply
    215,613.60x = 323,420.40 × 120,746.40
  4. Step 4: Simplify right side
    215,613.60x = 39,051,848,986.56
  5. Step 5: Solve for x
    x = 39,051,848,986.56/215,613.60
  6. Step 6: Final answer
    x = 181,119.60

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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.