Home / 142,107.56-196,108.40-78,445.36

Finding the Fourth Proportional to 142,107.56, 196,108.40 and 78,445.36

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Solution

The fourth proportional to 142,107.56, 196,108.40 and 78,445.36 is: 108,254.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,107.56 : 196,108.40 = 78,445.36 : x
  2. Step 2: Convert to fraction form
    142,107.56/196,108.40 = 78,445.36/x
  3. Step 3: Cross multiply
    142,107.56x = 196,108.40 × 78,445.36
  4. Step 4: Simplify right side
    142,107.56x = 15,383,794,037.02
  5. Step 5: Solve for x
    x = 15,383,794,037.02/142,107.56
  6. Step 6: Final answer
    x = 108,254.58

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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.