Home / 142,102.35-196,101.21-78,440.13

Finding the Fourth Proportional to 142,102.35, 196,101.21 and 78,440.13

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Solution

The fourth proportional to 142,102.35, 196,101.21 and 78,440.13 is: 108,247.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,102.35 : 196,101.21 = 78,440.13 : x
  2. Step 2: Convert to fraction form
    142,102.35/196,101.21 = 78,440.13/x
  3. Step 3: Cross multiply
    142,102.35x = 196,101.21 × 78,440.13
  4. Step 4: Simplify right side
    142,102.35x = 15,382,204,405.56
  5. Step 5: Solve for x
    x = 15,382,204,405.56/142,102.35
  6. Step 6: Final answer
    x = 108,247.36

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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.