Home / 81,472.10-112,447.26-53,128.58

Finding the Fourth Proportional to 81,472.10, 112,447.26 and 53,128.58

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Solution

The fourth proportional to 81,472.10, 112,447.26 and 53,128.58 is: 73,327.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,472.10 : 112,447.26 = 53,128.58 : x
  2. Step 2: Convert to fraction form
    81,472.10/112,447.26 = 53,128.58/x
  3. Step 3: Cross multiply
    81,472.10x = 112,447.26 × 53,128.58
  4. Step 4: Simplify right side
    81,472.10x = 5,974,162,686.45
  5. Step 5: Solve for x
    x = 5,974,162,686.45/81,472.10
  6. Step 6: Final answer
    x = 73,327.72

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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.