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Finding the Fourth Proportional to 81,621.83, 112,649.12 and 45,813.80

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Solution

The fourth proportional to 81,621.83, 112,649.12 and 45,813.80 is: 63,229.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,621.83 : 112,649.12 = 45,813.80 : x
  2. Step 2: Convert to fraction form
    81,621.83/112,649.12 = 45,813.80/x
  3. Step 3: Cross multiply
    81,621.83x = 112,649.12 × 45,813.80
  4. Step 4: Simplify right side
    81,621.83x = 5,160,884,253.86
  5. Step 5: Solve for x
    x = 5,160,884,253.86/81,621.83
  6. Step 6: Final answer
    x = 63,229.22

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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.