Home / 78,350.13-117,571.88-28,434.12

Finding the Fourth Proportional to 78,350.13, 117,571.88 and 28,434.12

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Solution

The fourth proportional to 78,350.13, 117,571.88 and 28,434.12 is: 42,668.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,350.13 : 117,571.88 = 28,434.12 : x
  2. Step 2: Convert to fraction form
    78,350.13/117,571.88 = 28,434.12/x
  3. Step 3: Cross multiply
    78,350.13x = 117,571.88 × 28,434.12
  4. Step 4: Simplify right side
    78,350.13x = 3,343,052,802.38
  5. Step 5: Solve for x
    x = 3,343,052,802.38/78,350.13
  6. Step 6: Final answer
    x = 42,668.12

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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.