Home / 143,243.21-197,681.13-78,715.17

Finding the Fourth Proportional to 143,243.21, 197,681.13 and 78,715.17

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Solution

The fourth proportional to 143,243.21, 197,681.13 and 78,715.17 is: 108,629.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,243.21 : 197,681.13 = 78,715.17 : x
  2. Step 2: Convert to fraction form
    143,243.21/197,681.13 = 78,715.17/x
  3. Step 3: Cross multiply
    143,243.21x = 197,681.13 × 78,715.17
  4. Step 4: Simplify right side
    143,243.21x = 15,560,503,753.74
  5. Step 5: Solve for x
    x = 15,560,503,753.74/143,243.21
  6. Step 6: Final answer
    x = 108,629.96

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1.5x scale

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.