Home / 78,313.51-117,532.68-28,407.97

Finding the Fourth Proportional to 78,313.51, 117,532.68 and 28,407.97

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Solution

The fourth proportional to 78,313.51, 117,532.68 and 28,407.97 is: 42,634.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,313.51 : 117,532.68 = 28,407.97 : x
  2. Step 2: Convert to fraction form
    78,313.51/117,532.68 = 28,407.97/x
  3. Step 3: Cross multiply
    78,313.51x = 117,532.68 × 28,407.97
  4. Step 4: Simplify right side
    78,313.51x = 3,338,864,847.46
  5. Step 5: Solve for x
    x = 3,338,864,847.46/78,313.51
  6. Step 6: Final answer
    x = 42,634.60

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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.