Home / 78,325.50-108,178.30-53,131.26

Finding the Fourth Proportional to 78,325.50, 108,178.30 and 53,131.26

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Solution

The fourth proportional to 78,325.50, 108,178.30 and 53,131.26 is: 73,381.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,325.50 : 108,178.30 = 53,131.26 : x
  2. Step 2: Convert to fraction form
    78,325.50/108,178.30 = 53,131.26/x
  3. Step 3: Cross multiply
    78,325.50x = 108,178.30 × 53,131.26
  4. Step 4: Simplify right side
    78,325.50x = 5,747,649,383.66
  5. Step 5: Solve for x
    x = 5,747,649,383.66/78,325.50
  6. Step 6: Final answer
    x = 73,381.59

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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.