Home / 78,519.10-108,358.14-42,711.03

Finding the Fourth Proportional to 78,519.10, 108,358.14 and 42,711.03

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Solution

The fourth proportional to 78,519.10, 108,358.14 and 42,711.03 is: 58,942.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,519.10 : 108,358.14 = 42,711.03 : x
  2. Step 2: Convert to fraction form
    78,519.10/108,358.14 = 42,711.03/x
  3. Step 3: Cross multiply
    78,519.10x = 108,358.14 × 42,711.03
  4. Step 4: Simplify right side
    78,519.10x = 4,628,087,768.28
  5. Step 5: Solve for x
    x = 4,628,087,768.28/78,519.10
  6. Step 6: Final answer
    x = 58,942.19

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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.