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Finding the Fourth Proportional to 81,164.80, 112,005.28 and 45,355.11

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Solution

The fourth proportional to 81,164.80, 112,005.28 and 45,355.11 is: 62,588.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,164.80 : 112,005.28 = 45,355.11 : x
  2. Step 2: Convert to fraction form
    81,164.80/112,005.28 = 45,355.11/x
  3. Step 3: Cross multiply
    81,164.80x = 112,005.28 × 45,355.11
  4. Step 4: Simplify right side
    81,164.80x = 5,080,011,431.65
  5. Step 5: Solve for x
    x = 5,080,011,431.65/81,164.80
  6. Step 6: Final answer
    x = 62,588.85

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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.