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Finding the Fourth Proportional to 81,281.88, 112,163.76 and 45,465.72

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Solution

The fourth proportional to 81,281.88, 112,163.76 and 45,465.72 is: 62,739.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,281.88 : 112,163.76 = 45,465.72 : x
  2. Step 2: Convert to fraction form
    81,281.88/112,163.76 = 45,465.72/x
  3. Step 3: Cross multiply
    81,281.88x = 112,163.76 × 45,465.72
  4. Step 4: Simplify right side
    81,281.88x = 5,099,606,106.31
  5. Step 5: Solve for x
    x = 5,099,606,106.31/81,281.88
  6. Step 6: Final answer
    x = 62,739.77

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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.