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Finding the Fourth Proportional to 143,955.46, 198,657.97 and 79,428.71

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Solution

The fourth proportional to 143,955.46, 198,657.97 and 79,428.71 is: 109,611.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,955.46 : 198,657.97 = 79,428.71 : x
  2. Step 2: Convert to fraction form
    143,955.46/198,657.97 = 79,428.71/x
  3. Step 3: Cross multiply
    143,955.46x = 198,657.97 × 79,428.71
  4. Step 4: Simplify right side
    143,955.46x = 15,779,146,457.02
  5. Step 5: Solve for x
    x = 15,779,146,457.02/143,955.46
  6. Step 6: Final answer
    x = 109,611.31

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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.