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Finding the Fourth Proportional to 279,009.10, 418,513.65 and 101,521.90

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Solution

The fourth proportional to 279,009.10, 418,513.65 and 101,521.90 is: 152,282.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,009.10 : 418,513.65 = 101,521.90 : x
  2. Step 2: Convert to fraction form
    279,009.10/418,513.65 = 101,521.90/x
  3. Step 3: Cross multiply
    279,009.10x = 418,513.65 × 101,521.90
  4. Step 4: Simplify right side
    279,009.10x = 42,488,300,923.94
  5. Step 5: Solve for x
    x = 42,488,300,923.94/279,009.10
  6. Step 6: Final answer
    x = 152,282.85

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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.