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Finding the Fourth Proportional to 81,504.51, 112,476.51 and 51,309.81

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Solution

The fourth proportional to 81,504.51, 112,476.51 and 51,309.81 is: 70,807.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,504.51 : 112,476.51 = 51,309.81 : x
  2. Step 2: Convert to fraction form
    81,504.51/112,476.51 = 51,309.81/x
  3. Step 3: Cross multiply
    81,504.51x = 112,476.51 × 51,309.81
  4. Step 4: Simplify right side
    81,504.51x = 5,771,148,357.56
  5. Step 5: Solve for x
    x = 5,771,148,357.56/81,504.51
  6. Step 6: Final answer
    x = 70,807.72

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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.