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Finding the Fourth Proportional to 42,636.65, 63,918.79 and 17,661.11

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Solution

The fourth proportional to 42,636.65, 63,918.79 and 17,661.11 is: 26,476.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,636.65 : 63,918.79 = 17,661.11 : x
  2. Step 2: Convert to fraction form
    42,636.65/63,918.79 = 17,661.11/x
  3. Step 3: Cross multiply
    42,636.65x = 63,918.79 × 17,661.11
  4. Step 4: Simplify right side
    42,636.65x = 1,128,876,417.51
  5. Step 5: Solve for x
    x = 1,128,876,417.51/42,636.65
  6. Step 6: Final answer
    x = 26,476.67

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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.