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Finding the Fourth Proportional to 128,491.80, 192,756.06 and 39,752.88

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Solution

The fourth proportional to 128,491.80, 192,756.06 and 39,752.88 is: 59,635.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,491.80 : 192,756.06 = 39,752.88 : x
  2. Step 2: Convert to fraction form
    128,491.80/192,756.06 = 39,752.88/x
  3. Step 3: Cross multiply
    128,491.80x = 192,756.06 × 39,752.88
  4. Step 4: Simplify right side
    128,491.80x = 7,662,608,522.45
  5. Step 5: Solve for x
    x = 7,662,608,522.45/128,491.80
  6. Step 6: Final answer
    x = 59,635.00

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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.