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Finding the Fourth Proportional to 289,689.20, 434,404.20 and 112,137.20

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Solution

The fourth proportional to 289,689.20, 434,404.20 and 112,137.20 is: 168,155.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,689.20 : 434,404.20 = 112,137.20 : x
  2. Step 2: Convert to fraction form
    289,689.20/434,404.20 = 112,137.20/x
  3. Step 3: Cross multiply
    289,689.20x = 434,404.20 × 112,137.20
  4. Step 4: Simplify right side
    289,689.20x = 48,712,870,656.24
  5. Step 5: Solve for x
    x = 48,712,870,656.24/289,689.20
  6. Step 6: Final answer
    x = 168,155.63

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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.