Home / 149,250.28-205,970.10-81,271.72

Finding the Fourth Proportional to 149,250.28, 205,970.10 and 81,271.72

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Solution

The fourth proportional to 149,250.28, 205,970.10 and 81,271.72 is: 112,157.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,250.28 : 205,970.10 = 81,271.72 : x
  2. Step 2: Convert to fraction form
    149,250.28/205,970.10 = 81,271.72/x
  3. Step 3: Cross multiply
    149,250.28x = 205,970.10 × 81,271.72
  4. Step 4: Simplify right side
    149,250.28x = 16,739,544,295.57
  5. Step 5: Solve for x
    x = 16,739,544,295.57/149,250.28
  6. Step 6: Final answer
    x = 112,157.54

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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.