Home / 81,000.48-111,780.30-45,190.53

Finding the Fourth Proportional to 81,000.48, 111,780.30 and 45,190.53

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Solution

The fourth proportional to 81,000.48, 111,780.30 and 45,190.53 is: 62,362.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,000.48 : 111,780.30 = 45,190.53 : x
  2. Step 2: Convert to fraction form
    81,000.48/111,780.30 = 45,190.53/x
  3. Step 3: Cross multiply
    81,000.48x = 111,780.30 × 45,190.53
  4. Step 4: Simplify right side
    81,000.48x = 5,051,411,000.56
  5. Step 5: Solve for x
    x = 5,051,411,000.56/81,000.48
  6. Step 6: Final answer
    x = 62,362.73

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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.