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Finding the Fourth Proportional to 142,617.92, 196,815.52 and 78,953.92

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Solution

The fourth proportional to 142,617.92, 196,815.52 and 78,953.92 is: 108,957.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,617.92 : 196,815.52 = 78,953.92 : x
  2. Step 2: Convert to fraction form
    142,617.92/196,815.52 = 78,953.92/x
  3. Step 3: Cross multiply
    142,617.92x = 196,815.52 × 78,953.92
  4. Step 4: Simplify right side
    142,617.92x = 15,539,356,820.84
  5. Step 5: Solve for x
    x = 15,539,356,820.84/142,617.92
  6. Step 6: Final answer
    x = 108,957.95

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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.