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Finding the Fourth Proportional to 128,075.46, 176,684.10 and 82,767.69

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Solution

The fourth proportional to 128,075.46, 176,684.10 and 82,767.69 is: 114,180.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,075.46 : 176,684.10 = 82,767.69 : x
  2. Step 2: Convert to fraction form
    128,075.46/176,684.10 = 82,767.69/x
  3. Step 3: Cross multiply
    128,075.46x = 176,684.10 × 82,767.69
  4. Step 4: Simplify right side
    128,075.46x = 14,623,734,816.73
  5. Step 5: Solve for x
    x = 14,623,734,816.73/128,075.46
  6. Step 6: Final answer
    x = 114,180.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.