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Finding the Fourth Proportional to 81,618.83, 112,644.97 and 45,810.80

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Solution

The fourth proportional to 81,618.83, 112,644.97 and 45,810.80 is: 63,225.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,618.83 : 112,644.97 = 45,810.80 : x
  2. Step 2: Convert to fraction form
    81,618.83/112,644.97 = 45,810.80/x
  3. Step 3: Cross multiply
    81,618.83x = 112,644.97 × 45,810.80
  4. Step 4: Simplify right side
    81,618.83x = 5,160,356,191.68
  5. Step 5: Solve for x
    x = 5,160,356,191.68/81,618.83
  6. Step 6: Final answer
    x = 63,225.07

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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.