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Finding the Fourth Proportional to 81,202.65, 112,551 and 76,530.66

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Solution

The fourth proportional to 81,202.65, 112,551 and 76,530.66 is: 106,075.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,202.65 : 112,551 = 76,530.66 : x
  2. Step 2: Convert to fraction form
    81,202.65/112,551 = 76,530.66/x
  3. Step 3: Cross multiply
    81,202.65x = 112,551 × 76,530.66
  4. Step 4: Simplify right side
    81,202.65x = 8,613,602,313.66
  5. Step 5: Solve for x
    x = 8,613,602,313.66/81,202.65
  6. Step 6: Final answer
    x = 106,075.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.