Home / 143,256.21-197,697.11-78,724.96

Finding the Fourth Proportional to 143,256.21, 197,697.11 and 78,724.96

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Solution

The fourth proportional to 143,256.21, 197,697.11 and 78,724.96 is: 108,642.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,256.21 : 197,697.11 = 78,724.96 : x
  2. Step 2: Convert to fraction form
    143,256.21/197,697.11 = 78,724.96/x
  3. Step 3: Cross multiply
    143,256.21x = 197,697.11 × 78,724.96
  4. Step 4: Simplify right side
    143,256.21x = 15,563,696,189.00
  5. Step 5: Solve for x
    x = 15,563,696,189.00/143,256.21
  6. Step 6: Final answer
    x = 108,642.39

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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.