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Finding the Fourth Proportional to 42,998.80, 64,523.16 and 18,036.88

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Solution

The fourth proportional to 42,998.80, 64,523.16 and 18,036.88 is: 27,065.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,998.80 : 64,523.16 = 18,036.88 : x
  2. Step 2: Convert to fraction form
    42,998.80/64,523.16 = 18,036.88/x
  3. Step 3: Cross multiply
    42,998.80x = 64,523.16 × 18,036.88
  4. Step 4: Simplify right side
    42,998.80x = 1,163,796,494.14
  5. Step 5: Solve for x
    x = 1,163,796,494.14/42,998.80
  6. Step 6: Final answer
    x = 27,065.79

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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.