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Finding the Fourth Proportional to 42,696.25, 64,042.99 and 19,322.69

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Solution

The fourth proportional to 42,696.25, 64,042.99 and 19,322.69 is: 28,983.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,696.25 : 64,042.99 = 19,322.69 : x
  2. Step 2: Convert to fraction form
    42,696.25/64,042.99 = 19,322.69/x
  3. Step 3: Cross multiply
    42,696.25x = 64,042.99 × 19,322.69
  4. Step 4: Simplify right side
    42,696.25x = 1,237,482,473.92
  5. Step 5: Solve for x
    x = 1,237,482,473.92/42,696.25
  6. Step 6: Final answer
    x = 28,983.40

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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.