Home / 142,655.38-196,862.01-78,991.81

Finding the Fourth Proportional to 142,655.38, 196,862.01 and 78,991.81

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Solution

The fourth proportional to 142,655.38, 196,862.01 and 78,991.81 is: 109,007.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,655.38 : 196,862.01 = 78,991.81 : x
  2. Step 2: Convert to fraction form
    142,655.38/196,862.01 = 78,991.81/x
  3. Step 3: Cross multiply
    142,655.38x = 196,862.01 × 78,991.81
  4. Step 4: Simplify right side
    142,655.38x = 15,550,486,490.14
  5. Step 5: Solve for x
    x = 15,550,486,490.14/142,655.38
  6. Step 6: Final answer
    x = 109,007.36

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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.