Home / 142,023.36-196,001.28-78,360.96

Finding the Fourth Proportional to 142,023.36, 196,001.28 and 78,360.96

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Solution

The fourth proportional to 142,023.36, 196,001.28 and 78,360.96 is: 108,143.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,023.36 : 196,001.28 = 78,360.96 : x
  2. Step 2: Convert to fraction form
    142,023.36/196,001.28 = 78,360.96/x
  3. Step 3: Cross multiply
    142,023.36x = 196,001.28 × 78,360.96
  4. Step 4: Simplify right side
    142,023.36x = 15,358,848,462.03
  5. Step 5: Solve for x
    x = 15,358,848,462.03/142,023.36
  6. Step 6: Final answer
    x = 108,143.11

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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.