Home / 142,120.00-196,125.57-78,458.25

Finding the Fourth Proportional to 142,120.00, 196,125.57 and 78,458.25

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Solution

The fourth proportional to 142,120.00, 196,125.57 and 78,458.25 is: 108,272.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,120.00 : 196,125.57 = 78,458.25 : x
  2. Step 2: Convert to fraction form
    142,120.00/196,125.57 = 78,458.25/x
  3. Step 3: Cross multiply
    142,120.00x = 196,125.57 × 78,458.25
  4. Step 4: Simplify right side
    142,120.00x = 15,387,669,737.92
  5. Step 5: Solve for x
    x = 15,387,669,737.92/142,120.00
  6. Step 6: Final answer
    x = 108,272.37

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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.