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Finding the Fourth Proportional to 128,600.98, 192,956.58 and 66,315.22

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Solution

The fourth proportional to 128,600.98, 192,956.58 and 66,315.22 is: 99,501.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,600.98 : 192,956.58 = 66,315.22 : x
  2. Step 2: Convert to fraction form
    128,600.98/192,956.58 = 66,315.22/x
  3. Step 3: Cross multiply
    128,600.98x = 192,956.58 × 66,315.22
  4. Step 4: Simplify right side
    128,600.98x = 12,795,958,053.15
  5. Step 5: Solve for x
    x = 12,795,958,053.15/128,600.98
  6. Step 6: Final answer
    x = 99,501.25

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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.