Home / 57,180.90-78,912.81-31,686.74

Finding the Fourth Proportional to 57,180.90, 78,912.81 and 31,686.74

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Solution

The fourth proportional to 57,180.90, 78,912.81 and 31,686.74 is: 43,729.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,180.90 : 78,912.81 = 31,686.74 : x
  2. Step 2: Convert to fraction form
    57,180.90/78,912.81 = 31,686.74/x
  3. Step 3: Cross multiply
    57,180.90x = 78,912.81 × 31,686.74
  4. Step 4: Simplify right side
    57,180.90x = 2,500,489,283.44
  5. Step 5: Solve for x
    x = 2,500,489,283.44/57,180.90
  6. Step 6: Final answer
    x = 43,729.45

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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.