Home / 129,899.50-179,242.07-78,885.63

Finding the Fourth Proportional to 129,899.50, 179,242.07 and 78,885.63

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Solution

The fourth proportional to 129,899.50, 179,242.07 and 78,885.63 is: 108,850.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,899.50 : 179,242.07 = 78,885.63 : x
  2. Step 2: Convert to fraction form
    129,899.50/179,242.07 = 78,885.63/x
  3. Step 3: Cross multiply
    129,899.50x = 179,242.07 × 78,885.63
  4. Step 4: Simplify right side
    129,899.50x = 14,139,623,220.03
  5. Step 5: Solve for x
    x = 14,139,623,220.03/129,899.50
  6. Step 6: Final answer
    x = 108,850.48

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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.