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Finding the Fourth Proportional to 289,595.20, 434,047.20 and 121,115.20

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Solution

The fourth proportional to 289,595.20, 434,047.20 and 121,115.20 is: 181,528.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,595.20 : 434,047.20 = 121,115.20 : x
  2. Step 2: Convert to fraction form
    289,595.20/434,047.20 = 121,115.20/x
  3. Step 3: Cross multiply
    289,595.20x = 434,047.20 × 121,115.20
  4. Step 4: Simplify right side
    289,595.20x = 52,569,713,437.44
  5. Step 5: Solve for x
    x = 52,569,713,437.44/289,595.20
  6. Step 6: Final answer
    x = 181,528.26

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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.