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Finding the Fourth Proportional to 81,385.94, 112,311.28 and 45,575.64

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Solution

The fourth proportional to 81,385.94, 112,311.28 and 45,575.64 is: 62,893.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,385.94 : 112,311.28 = 45,575.64 : x
  2. Step 2: Convert to fraction form
    81,385.94/112,311.28 = 45,575.64/x
  3. Step 3: Cross multiply
    81,385.94x = 112,311.28 × 45,575.64
  4. Step 4: Simplify right side
    81,385.94x = 5,118,658,465.22
  5. Step 5: Solve for x
    x = 5,118,658,465.22/81,385.94
  6. Step 6: Final answer
    x = 62,893.65

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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.