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Finding the Fourth Proportional to 279,114.10, 418,541.55 and 121,261.30

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Solution

The fourth proportional to 279,114.10, 418,541.55 and 121,261.30 is: 181,835.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,114.10 : 418,541.55 = 121,261.30 : x
  2. Step 2: Convert to fraction form
    279,114.10/418,541.55 = 121,261.30/x
  3. Step 3: Cross multiply
    279,114.10x = 418,541.55 × 121,261.30
  4. Step 4: Simplify right side
    279,114.10x = 50,752,892,457.02
  5. Step 5: Solve for x
    x = 50,752,892,457.02/279,114.10
  6. Step 6: Final answer
    x = 181,835.65

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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.