Home / 81,748.73-122,669.67-31,822.35

Finding the Fourth Proportional to 81,748.73, 122,669.67 and 31,822.35

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Solution

The fourth proportional to 81,748.73, 122,669.67 and 31,822.35 is: 47,751.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,748.73 : 122,669.67 = 31,822.35 : x
  2. Step 2: Convert to fraction form
    81,748.73/122,669.67 = 31,822.35/x
  3. Step 3: Cross multiply
    81,748.73x = 122,669.67 × 31,822.35
  4. Step 4: Simplify right side
    81,748.73x = 3,903,637,173.12
  5. Step 5: Solve for x
    x = 3,903,637,173.12/81,748.73
  6. Step 6: Final answer
    x = 47,751.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.