Home / 143,057.71-197,415.66-78,526.90

Finding the Fourth Proportional to 143,057.71, 197,415.66 and 78,526.90

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Solution

The fourth proportional to 143,057.71, 197,415.66 and 78,526.90 is: 108,364.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,057.71 : 197,415.66 = 78,526.90 : x
  2. Step 2: Convert to fraction form
    143,057.71/197,415.66 = 78,526.90/x
  3. Step 3: Cross multiply
    143,057.71x = 197,415.66 × 78,526.90
  4. Step 4: Simplify right side
    143,057.71x = 15,502,439,791.25
  5. Step 5: Solve for x
    x = 15,502,439,791.25/143,057.71
  6. Step 6: Final answer
    x = 108,364.94

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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.