Home / 129,415.26-178,563.51-72,805.98

Finding the Fourth Proportional to 129,415.26, 178,563.51 and 72,805.98

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Solution

The fourth proportional to 129,415.26, 178,563.51 and 72,805.98 is: 100,455.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,415.26 : 178,563.51 = 72,805.98 : x
  2. Step 2: Convert to fraction form
    129,415.26/178,563.51 = 72,805.98/x
  3. Step 3: Cross multiply
    129,415.26x = 178,563.51 × 72,805.98
  4. Step 4: Simplify right side
    129,415.26x = 13,000,491,337.79
  5. Step 5: Solve for x
    x = 13,000,491,337.79/129,415.26
  6. Step 6: Final answer
    x = 100,455.63

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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.