Home / 78,136.13-117,267.03-40,707.38

Finding the Fourth Proportional to 78,136.13, 117,267.03 and 40,707.38

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Solution

The fourth proportional to 78,136.13, 117,267.03 and 40,707.38 is: 61,093.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,136.13 : 117,267.03 = 40,707.38 : x
  2. Step 2: Convert to fraction form
    78,136.13/117,267.03 = 40,707.38/x
  3. Step 3: Cross multiply
    78,136.13x = 117,267.03 × 40,707.38
  4. Step 4: Simplify right side
    78,136.13x = 4,773,632,965.35
  5. Step 5: Solve for x
    x = 4,773,632,965.35/78,136.13
  6. Step 6: Final answer
    x = 61,093.80

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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.