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Finding the Fourth Proportional to 81,225.99, 111,883.68 and 57,310.74

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Solution

The fourth proportional to 81,225.99, 111,883.68 and 57,310.74 is: 78,941.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,225.99 : 111,883.68 = 57,310.74 : x
  2. Step 2: Convert to fraction form
    81,225.99/111,883.68 = 57,310.74/x
  3. Step 3: Cross multiply
    81,225.99x = 111,883.68 × 57,310.74
  4. Step 4: Simplify right side
    81,225.99x = 6,412,136,494.72
  5. Step 5: Solve for x
    x = 6,412,136,494.72/81,225.99
  6. Step 6: Final answer
    x = 78,941.93

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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.