Home / 142,108.13-196,109.03-78,445.78

Finding the Fourth Proportional to 142,108.13, 196,109.03 and 78,445.78

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Solution

The fourth proportional to 142,108.13, 196,109.03 and 78,445.78 is: 108,255.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,108.13 : 196,109.03 = 78,445.78 : x
  2. Step 2: Convert to fraction form
    142,108.13/196,109.03 = 78,445.78/x
  3. Step 3: Cross multiply
    142,108.13x = 196,109.03 × 78,445.78
  4. Step 4: Simplify right side
    142,108.13x = 15,383,925,529.24
  5. Step 5: Solve for x
    x = 15,383,925,529.24/142,108.13
  6. Step 6: Final answer
    x = 108,255.07

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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.