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Finding the Fourth Proportional to 143,213, 197,686.86 and 122,988.38

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Solution

The fourth proportional to 143,213, 197,686.86 and 122,988.38 is: 169,769.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,213 : 197,686.86 = 122,988.38 : x
  2. Step 2: Convert to fraction form
    143,213/197,686.86 = 122,988.38/x
  3. Step 3: Cross multiply
    143,213x = 197,686.86 × 122,988.38
  4. Step 4: Simplify right side
    143,213x = 24,313,186,658.69
  5. Step 5: Solve for x
    x = 24,313,186,658.69/143,213
  6. Step 6: Final answer
    x = 169,769.41

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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.