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Finding the Fourth Proportional to 123,303.68, 170,113.56 and 80,919.80

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Solution

The fourth proportional to 123,303.68, 170,113.56 and 80,919.80 is: 111,639.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,303.68 : 170,113.56 = 80,919.80 : x
  2. Step 2: Convert to fraction form
    123,303.68/170,113.56 = 80,919.80/x
  3. Step 3: Cross multiply
    123,303.68x = 170,113.56 × 80,919.80
  4. Step 4: Simplify right side
    123,303.68x = 13,765,555,252.49
  5. Step 5: Solve for x
    x = 13,765,555,252.49/123,303.68
  6. Step 6: Final answer
    x = 111,639.45

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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.