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Finding the Fourth Proportional to 119,628.80, 179,443.20 and 83,859.20

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Solution

The fourth proportional to 119,628.80, 179,443.20 and 83,859.20 is: 125,788.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,628.80 : 179,443.20 = 83,859.20 : x
  2. Step 2: Convert to fraction form
    119,628.80/179,443.20 = 83,859.20/x
  3. Step 3: Cross multiply
    119,628.80x = 179,443.20 × 83,859.20
  4. Step 4: Simplify right side
    119,628.80x = 15,047,963,197.44
  5. Step 5: Solve for x
    x = 15,047,963,197.44/119,628.80
  6. Step 6: Final answer
    x = 125,788.80

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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.