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Finding the Fourth Proportional to 279,064.87, 418,587.81 and 121,293.34

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Solution

The fourth proportional to 279,064.87, 418,587.81 and 121,293.34 is: 181,935.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,064.87 : 418,587.81 = 121,293.34 : x
  2. Step 2: Convert to fraction form
    279,064.87/418,587.81 = 121,293.34/x
  3. Step 3: Cross multiply
    279,064.87x = 418,587.81 × 121,293.34
  4. Step 4: Simplify right side
    279,064.87x = 50,771,913,558.19
  5. Step 5: Solve for x
    x = 50,771,913,558.19/279,064.87
  6. Step 6: Final answer
    x = 181,935.88

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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.