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Finding the Fourth Proportional to 81,699.71, 112,732.38 and 51,069.22

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Solution

The fourth proportional to 81,699.71, 112,732.38 and 51,069.22 is: 70,467.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,699.71 : 112,732.38 = 51,069.22 : x
  2. Step 2: Convert to fraction form
    81,699.71/112,732.38 = 51,069.22/x
  3. Step 3: Cross multiply
    81,699.71x = 112,732.38 × 51,069.22
  4. Step 4: Simplify right side
    81,699.71x = 5,757,154,433.51
  5. Step 5: Solve for x
    x = 5,757,154,433.51/81,699.71
  6. Step 6: Final answer
    x = 70,467.26

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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.