Home / 142,092.90-196,089.83-78,430.75

Finding the Fourth Proportional to 142,092.90, 196,089.83 and 78,430.75

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Solution

The fourth proportional to 142,092.90, 196,089.83 and 78,430.75 is: 108,235.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,092.90 : 196,089.83 = 78,430.75 : x
  2. Step 2: Convert to fraction form
    142,092.90/196,089.83 = 78,430.75/x
  3. Step 3: Cross multiply
    142,092.90x = 196,089.83 × 78,430.75
  4. Step 4: Simplify right side
    142,092.90x = 15,379,471,846.01
  5. Step 5: Solve for x
    x = 15,379,471,846.01/142,092.90
  6. Step 6: Final answer
    x = 108,235.33

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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.