Home / 143,242.36-197,673.79-78,715.61

Finding the Fourth Proportional to 143,242.36, 197,673.79 and 78,715.61

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Solution

The fourth proportional to 143,242.36, 197,673.79 and 78,715.61 is: 108,627.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,242.36 : 197,673.79 = 78,715.61 : x
  2. Step 2: Convert to fraction form
    143,242.36/197,673.79 = 78,715.61/x
  3. Step 3: Cross multiply
    143,242.36x = 197,673.79 × 78,715.61
  4. Step 4: Simplify right side
    143,242.36x = 15,560,012,070.89
  5. Step 5: Solve for x
    x = 15,560,012,070.89/143,242.36
  6. Step 6: Final answer
    x = 108,627.17

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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.