Home / 142,102.08-196,100.19-78,439.32

Finding the Fourth Proportional to 142,102.08, 196,100.19 and 78,439.32

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Solution

The fourth proportional to 142,102.08, 196,100.19 and 78,439.32 is: 108,245.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,102.08 : 196,100.19 = 78,439.32 : x
  2. Step 2: Convert to fraction form
    142,102.08/196,100.19 = 78,439.32/x
  3. Step 3: Cross multiply
    142,102.08x = 196,100.19 × 78,439.32
  4. Step 4: Simplify right side
    142,102.08x = 15,381,965,555.47
  5. Step 5: Solve for x
    x = 15,381,965,555.47/142,102.08
  6. Step 6: Final answer
    x = 108,245.89

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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.