Home / 143,347.05-197,801.73-78,805.65

Finding the Fourth Proportional to 143,347.05, 197,801.73 and 78,805.65

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Solution

The fourth proportional to 143,347.05, 197,801.73 and 78,805.65 is: 108,742.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,347.05 : 197,801.73 = 78,805.65 : x
  2. Step 2: Convert to fraction form
    143,347.05/197,801.73 = 78,805.65/x
  3. Step 3: Cross multiply
    143,347.05x = 197,801.73 × 78,805.65
  4. Step 4: Simplify right side
    143,347.05x = 15,587,893,903.77
  5. Step 5: Solve for x
    x = 15,587,893,903.77/143,347.05
  6. Step 6: Final answer
    x = 108,742.34

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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.