Home / 81,115.34-111,938.00-45,305.87

Finding the Fourth Proportional to 81,115.34, 111,938.00 and 45,305.87

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Solution

The fourth proportional to 81,115.34, 111,938.00 and 45,305.87 is: 62,521.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,115.34 : 111,938.00 = 45,305.87 : x
  2. Step 2: Convert to fraction form
    81,115.34/111,938.00 = 45,305.87/x
  3. Step 3: Cross multiply
    81,115.34x = 111,938.00 × 45,305.87
  4. Step 4: Simplify right side
    81,115.34x = 5,071,447,689.84
  5. Step 5: Solve for x
    x = 5,071,447,689.84/81,115.34
  6. Step 6: Final answer
    x = 62,521.44

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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.