Home / 57,187.95-78,919.38-31,698.15

Finding the Fourth Proportional to 57,187.95, 78,919.38 and 31,698.15

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Solution

The fourth proportional to 57,187.95, 78,919.38 and 31,698.15 is: 43,743.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,187.95 : 78,919.38 = 31,698.15 : x
  2. Step 2: Convert to fraction form
    57,187.95/78,919.38 = 31,698.15/x
  3. Step 3: Cross multiply
    57,187.95x = 78,919.38 × 31,698.15
  4. Step 4: Simplify right side
    57,187.95x = 2,501,598,151.31
  5. Step 5: Solve for x
    x = 2,501,598,151.31/57,187.95
  6. Step 6: Final answer
    x = 43,743.45

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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.