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Finding the Fourth Proportional to 279,088.92, 418,602.26 and 76,700.54

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Solution

The fourth proportional to 279,088.92, 418,602.26 and 76,700.54 is: 115,042.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,088.92 : 418,602.26 = 76,700.54 : x
  2. Step 2: Convert to fraction form
    279,088.92/418,602.26 = 76,700.54/x
  3. Step 3: Cross multiply
    279,088.92x = 418,602.26 × 76,700.54
  4. Step 4: Simplify right side
    279,088.92x = 32,107,016,910.71
  5. Step 5: Solve for x
    x = 32,107,016,910.71/279,088.92
  6. Step 6: Final answer
    x = 115,042.25

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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.