Home / 142,114.08-196,112.29-78,450.51

Finding the Fourth Proportional to 142,114.08, 196,112.29 and 78,450.51

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Solution

The fourth proportional to 142,114.08, 196,112.29 and 78,450.51 is: 108,258.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,114.08 : 196,112.29 = 78,450.51 : x
  2. Step 2: Convert to fraction form
    142,114.08/196,112.29 = 78,450.51/x
  3. Step 3: Cross multiply
    142,114.08x = 196,112.29 × 78,450.51
  4. Step 4: Simplify right side
    142,114.08x = 15,385,108,481.36
  5. Step 5: Solve for x
    x = 15,385,108,481.36/142,114.08
  6. Step 6: Final answer
    x = 108,258.86

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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.