Home / 142,661.49-196,870.45-78,997.92

Finding the Fourth Proportional to 142,661.49, 196,870.45 and 78,997.92

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Solution

The fourth proportional to 142,661.49, 196,870.45 and 78,997.92 is: 109,015.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,661.49 : 196,870.45 = 78,997.92 : x
  2. Step 2: Convert to fraction form
    142,661.49/196,870.45 = 78,997.92/x
  3. Step 3: Cross multiply
    142,661.49x = 196,870.45 × 78,997.92
  4. Step 4: Simplify right side
    142,661.49x = 15,552,356,059.46
  5. Step 5: Solve for x
    x = 15,552,356,059.46/142,661.49
  6. Step 6: Final answer
    x = 109,015.80

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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.