Home / 142,113.55-196,115.75-78,451.33

Finding the Fourth Proportional to 142,113.55, 196,115.75 and 78,451.33

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Solution

The fourth proportional to 142,113.55, 196,115.75 and 78,451.33 is: 108,262.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,113.55 : 196,115.75 = 78,451.33 : x
  2. Step 2: Convert to fraction form
    142,113.55/196,115.75 = 78,451.33/x
  3. Step 3: Cross multiply
    142,113.55x = 196,115.75 × 78,451.33
  4. Step 4: Simplify right side
    142,113.55x = 15,385,541,029.19
  5. Step 5: Solve for x
    x = 15,385,541,029.19/142,113.55
  6. Step 6: Final answer
    x = 108,262.31

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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.