Home / 57,134.80-78,845.16-31,985.20

Finding the Fourth Proportional to 57,134.80, 78,845.16 and 31,985.20

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Solution

The fourth proportional to 57,134.80, 78,845.16 and 31,985.20 is: 44,139.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,134.80 : 78,845.16 = 31,985.20 : x
  2. Step 2: Convert to fraction form
    57,134.80/78,845.16 = 31,985.20/x
  3. Step 3: Cross multiply
    57,134.80x = 78,845.16 × 31,985.20
  4. Step 4: Simplify right side
    57,134.80x = 2,521,878,211.63
  5. Step 5: Solve for x
    x = 2,521,878,211.63/57,134.80
  6. Step 6: Final answer
    x = 44,139.09

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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.