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Finding the Fourth Proportional to 128,855.10, 193,323.15 and 62,297.40

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Solution

The fourth proportional to 128,855.10, 193,323.15 and 62,297.40 is: 93,465.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,855.10 : 193,323.15 = 62,297.40 : x
  2. Step 2: Convert to fraction form
    128,855.10/193,323.15 = 62,297.40/x
  3. Step 3: Cross multiply
    128,855.10x = 193,323.15 × 62,297.40
  4. Step 4: Simplify right side
    128,855.10x = 12,043,529,604.81
  5. Step 5: Solve for x
    x = 12,043,529,604.81/128,855.10
  6. Step 6: Final answer
    x = 93,465.68

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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.