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Finding the Fourth Proportional to 120,653.20, 180,688.20 and 115,404.40

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Solution

The fourth proportional to 120,653.20, 180,688.20 and 115,404.40 is: 172,827.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,653.20 : 180,688.20 = 115,404.40 : x
  2. Step 2: Convert to fraction form
    120,653.20/180,688.20 = 115,404.40/x
  3. Step 3: Cross multiply
    120,653.20x = 180,688.20 × 115,404.40
  4. Step 4: Simplify right side
    120,653.20x = 20,852,213,308.08
  5. Step 5: Solve for x
    x = 20,852,213,308.08/120,653.20
  6. Step 6: Final answer
    x = 172,827.69

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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.