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Finding the Fourth Proportional to 128,378.46, 192,493.71 and 49,482.30

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Solution

The fourth proportional to 128,378.46, 192,493.71 and 49,482.30 is: 74,194.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,378.46 : 192,493.71 = 49,482.30 : x
  2. Step 2: Convert to fraction form
    128,378.46/192,493.71 = 49,482.30/x
  3. Step 3: Cross multiply
    128,378.46x = 192,493.71 × 49,482.30
  4. Step 4: Simplify right side
    128,378.46x = 9,525,031,506.33
  5. Step 5: Solve for x
    x = 9,525,031,506.33/128,378.46
  6. Step 6: Final answer
    x = 74,194.94

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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.