Home / 81,112.50-111,935-45,302.52

Finding the Fourth Proportional to 81,112.50, 111,935 and 45,302.52

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Solution

The fourth proportional to 81,112.50, 111,935 and 45,302.52 is: 62,517.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,112.50 : 111,935 = 45,302.52 : x
  2. Step 2: Convert to fraction form
    81,112.50/111,935 = 45,302.52/x
  3. Step 3: Cross multiply
    81,112.50x = 111,935 × 45,302.52
  4. Step 4: Simplify right side
    81,112.50x = 5,070,937,576.20
  5. Step 5: Solve for x
    x = 5,070,937,576.20/81,112.50
  6. Step 6: Final answer
    x = 62,517.34

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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.