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Finding the Fourth Proportional to 143,001, 197,334.66 and 78,468.78

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Solution

The fourth proportional to 143,001, 197,334.66 and 78,468.78 is: 108,283.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,001 : 197,334.66 = 78,468.78 : x
  2. Step 2: Convert to fraction form
    143,001/197,334.66 = 78,468.78/x
  3. Step 3: Cross multiply
    143,001x = 197,334.66 × 78,468.78
  4. Step 4: Simplify right side
    143,001x = 15,484,610,021.91
  5. Step 5: Solve for x
    x = 15,484,610,021.91/143,001
  6. Step 6: Final answer
    x = 108,283.23

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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.