Home / 142,107.36-196,109.76-78,445.20

Finding the Fourth Proportional to 142,107.36, 196,109.76 and 78,445.20

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Solution

The fourth proportional to 142,107.36, 196,109.76 and 78,445.20 is: 108,255.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,107.36 : 196,109.76 = 78,445.20 : x
  2. Step 2: Convert to fraction form
    142,107.36/196,109.76 = 78,445.20/x
  3. Step 3: Cross multiply
    142,107.36x = 196,109.76 × 78,445.20
  4. Step 4: Simplify right side
    142,107.36x = 15,383,869,345.15
  5. Step 5: Solve for x
    x = 15,383,869,345.15/142,107.36
  6. Step 6: Final answer
    x = 108,255.26

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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.