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Finding the Fourth Proportional to 143,999.81, 198,724.51 and 78,592.21

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Solution

The fourth proportional to 143,999.81, 198,724.51 and 78,592.21 is: 108,459.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,999.81 : 198,724.51 = 78,592.21 : x
  2. Step 2: Convert to fraction form
    143,999.81/198,724.51 = 78,592.21/x
  3. Step 3: Cross multiply
    143,999.81x = 198,724.51 × 78,592.21
  4. Step 4: Simplify right side
    143,999.81x = 15,618,197,728.78
  5. Step 5: Solve for x
    x = 15,618,197,728.78/143,999.81
  6. Step 6: Final answer
    x = 108,459.85

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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.