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Finding the Fourth Proportional to 129,995.99, 179,395.65 and 76,281.90

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Solution

The fourth proportional to 129,995.99, 179,395.65 and 76,281.90 is: 105,269.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,995.99 : 179,395.65 = 76,281.90 : x
  2. Step 2: Convert to fraction form
    129,995.99/179,395.65 = 76,281.90/x
  3. Step 3: Cross multiply
    129,995.99x = 179,395.65 × 76,281.90
  4. Step 4: Simplify right side
    129,995.99x = 13,684,640,361.00
  5. Step 5: Solve for x
    x = 13,684,640,361.00/129,995.99
  6. Step 6: Final answer
    x = 105,269.71

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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.