Home / 142,587.56-196,768.36-78,923.96

Finding the Fourth Proportional to 142,587.56, 196,768.36 and 78,923.96

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Solution

The fourth proportional to 142,587.56, 196,768.36 and 78,923.96 is: 108,913.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,587.56 : 196,768.36 = 78,923.96 : x
  2. Step 2: Convert to fraction form
    142,587.56/196,768.36 = 78,923.96/x
  3. Step 3: Cross multiply
    142,587.56x = 196,768.36 × 78,923.96
  4. Step 4: Simplify right side
    142,587.56x = 15,529,738,173.91
  5. Step 5: Solve for x
    x = 15,529,738,173.91/142,587.56
  6. Step 6: Final answer
    x = 108,913.70

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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.