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Finding the Fourth Proportional to 128,604.75, 192,925.92 and 61,990.10

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Solution

The fourth proportional to 128,604.75, 192,925.92 and 61,990.10 is: 92,994.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,604.75 : 192,925.92 = 61,990.10 : x
  2. Step 2: Convert to fraction form
    128,604.75/192,925.92 = 61,990.10/x
  3. Step 3: Cross multiply
    128,604.75x = 192,925.92 × 61,990.10
  4. Step 4: Simplify right side
    128,604.75x = 11,959,496,575.46
  5. Step 5: Solve for x
    x = 11,959,496,575.46/128,604.75
  6. Step 6: Final answer
    x = 92,994.21

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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.