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Finding the Fourth Proportional to 81,189.72, 112,041.44 and 45,379.72

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Solution

The fourth proportional to 81,189.72, 112,041.44 and 45,379.72 is: 62,623.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,189.72 : 112,041.44 = 45,379.72 : x
  2. Step 2: Convert to fraction form
    81,189.72/112,041.44 = 45,379.72/x
  3. Step 3: Cross multiply
    81,189.72x = 112,041.44 × 45,379.72
  4. Step 4: Simplify right side
    81,189.72x = 5,084,409,175.60
  5. Step 5: Solve for x
    x = 5,084,409,175.60/81,189.72
  6. Step 6: Final answer
    x = 62,623.80

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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.