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Finding the Fourth Proportional to 103,668.66, 143,026.16 and 67,878.41

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Solution

The fourth proportional to 103,668.66, 143,026.16 and 67,878.41 is: 93,648.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,668.66 : 143,026.16 = 67,878.41 : x
  2. Step 2: Convert to fraction form
    103,668.66/143,026.16 = 67,878.41/x
  3. Step 3: Cross multiply
    103,668.66x = 143,026.16 × 67,878.41
  4. Step 4: Simplify right side
    103,668.66x = 9,708,387,274.68
  5. Step 5: Solve for x
    x = 9,708,387,274.68/103,668.66
  6. Step 6: Final answer
    x = 93,648.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.