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Finding the Fourth Proportional to 142,551.96, 196,727.87 and 78,889.77

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Solution

The fourth proportional to 142,551.96, 196,727.87 and 78,889.77 is: 108,871.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,551.96 : 196,727.87 = 78,889.77 : x
  2. Step 2: Convert to fraction form
    142,551.96/196,727.87 = 78,889.77/x
  3. Step 3: Cross multiply
    142,551.96x = 196,727.87 × 78,889.77
  4. Step 4: Simplify right side
    142,551.96x = 15,519,817,105.93
  5. Step 5: Solve for x
    x = 15,519,817,105.93/142,551.96
  6. Step 6: Final answer
    x = 108,871.30

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1.5x scale

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.