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Finding the Fourth Proportional to 128,510.80, 192,742.94 and 34,994.68

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Solution

The fourth proportional to 128,510.80, 192,742.94 and 34,994.68 is: 52,485.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,510.80 : 192,742.94 = 34,994.68 : x
  2. Step 2: Convert to fraction form
    128,510.80/192,742.94 = 34,994.68/x
  3. Step 3: Cross multiply
    128,510.80x = 192,742.94 × 34,994.68
  4. Step 4: Simplify right side
    128,510.80x = 6,744,977,507.56
  5. Step 5: Solve for x
    x = 6,744,977,507.56/128,510.80
  6. Step 6: Final answer
    x = 52,485.69

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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.