Home / 142,657.49-196,864.94-78,993.92

Finding the Fourth Proportional to 142,657.49, 196,864.94 and 78,993.92

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Solution

The fourth proportional to 142,657.49, 196,864.94 and 78,993.92 is: 109,010.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,657.49 : 196,864.94 = 78,993.92 : x
  2. Step 2: Convert to fraction form
    142,657.49/196,864.94 = 78,993.92/x
  3. Step 3: Cross multiply
    142,657.49x = 196,864.94 × 78,993.92
  4. Step 4: Simplify right side
    142,657.49x = 15,551,131,941.87
  5. Step 5: Solve for x
    x = 15,551,131,941.87/142,657.49
  6. Step 6: Final answer
    x = 109,010.28

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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.