Home / 143,239.12-197,673.50-78,707.84

Finding the Fourth Proportional to 143,239.12, 197,673.50 and 78,707.84

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Solution

The fourth proportional to 143,239.12, 197,673.50 and 78,707.84 is: 108,618.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,239.12 : 197,673.50 = 78,707.84 : x
  2. Step 2: Convert to fraction form
    143,239.12/197,673.50 = 78,707.84/x
  3. Step 3: Cross multiply
    143,239.12x = 197,673.50 × 78,707.84
  4. Step 4: Simplify right side
    143,239.12x = 15,558,453,418.64
  5. Step 5: Solve for x
    x = 15,558,453,418.64/143,239.12
  6. Step 6: Final answer
    x = 108,618.75

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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.