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Finding the Fourth Proportional to 266,112.30, 399,246.21 and 79,128.30

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Solution

The fourth proportional to 266,112.30, 399,246.21 and 79,128.30 is: 118,715.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,112.30 : 399,246.21 = 79,128.30 : x
  2. Step 2: Convert to fraction form
    266,112.30/399,246.21 = 79,128.30/x
  3. Step 3: Cross multiply
    266,112.30x = 399,246.21 × 79,128.30
  4. Step 4: Simplify right side
    266,112.30x = 31,591,673,878.74
  5. Step 5: Solve for x
    x = 31,591,673,878.74/266,112.30
  6. Step 6: Final answer
    x = 118,715.57

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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.