Home / 57,215.11-78,956.71-31,720.82

Finding the Fourth Proportional to 57,215.11, 78,956.71 and 31,720.82

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Solution

The fourth proportional to 57,215.11, 78,956.71 and 31,720.82 is: 43,774.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,215.11 : 78,956.71 = 31,720.82 : x
  2. Step 2: Convert to fraction form
    57,215.11/78,956.71 = 31,720.82/x
  3. Step 3: Cross multiply
    57,215.11x = 78,956.71 × 31,720.82
  4. Step 4: Simplify right side
    57,215.11x = 2,504,572,095.28
  5. Step 5: Solve for x
    x = 2,504,572,095.28/57,215.11
  6. Step 6: Final answer
    x = 43,774.66

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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.