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Finding the Fourth Proportional to 142,420.92, 213,629.04 and 58,162.56

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Solution

The fourth proportional to 142,420.92, 213,629.04 and 58,162.56 is: 87,242.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,420.92 : 213,629.04 = 58,162.56 : x
  2. Step 2: Convert to fraction form
    142,420.92/213,629.04 = 58,162.56/x
  3. Step 3: Cross multiply
    142,420.92x = 213,629.04 × 58,162.56
  4. Step 4: Simplify right side
    142,420.92x = 12,425,211,856.74
  5. Step 5: Solve for x
    x = 12,425,211,856.74/142,420.92
  6. Step 6: Final answer
    x = 87,242.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.