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Finding the Fourth Proportional to 128,103.53, 192,272.84 and 64,967.57

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Solution

The fourth proportional to 128,103.53, 192,272.84 and 64,967.57 is: 97,510.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,103.53 : 192,272.84 = 64,967.57 : x
  2. Step 2: Convert to fraction form
    128,103.53/192,272.84 = 64,967.57/x
  3. Step 3: Cross multiply
    128,103.53x = 192,272.84 × 64,967.57
  4. Step 4: Simplify right side
    128,103.53x = 12,491,498,870.25
  5. Step 5: Solve for x
    x = 12,491,498,870.25/128,103.53
  6. Step 6: Final answer
    x = 97,510.97

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1.5x scale

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.