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Finding the Fourth Proportional to 78,763.88, 118,169.28 and 36,668.84

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Solution

The fourth proportional to 78,763.88, 118,169.28 and 36,668.84 is: 55,014.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,763.88 : 118,169.28 = 36,668.84 : x
  2. Step 2: Convert to fraction form
    78,763.88/118,169.28 = 36,668.84/x
  3. Step 3: Cross multiply
    78,763.88x = 118,169.28 × 36,668.84
  4. Step 4: Simplify right side
    78,763.88x = 4,333,130,421.24
  5. Step 5: Solve for x
    x = 4,333,130,421.24/78,763.88
  6. Step 6: Final answer
    x = 55,014.18

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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.