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Finding the Fourth Proportional to 86,800.71, 130,211.54 and 30,629.27

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Solution

The fourth proportional to 86,800.71, 130,211.54 and 30,629.27 is: 45,947.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,800.71 : 130,211.54 = 30,629.27 : x
  2. Step 2: Convert to fraction form
    86,800.71/130,211.54 = 30,629.27/x
  3. Step 3: Cross multiply
    86,800.71x = 130,211.54 × 30,629.27
  4. Step 4: Simplify right side
    86,800.71x = 3,988,283,611.57
  5. Step 5: Solve for x
    x = 3,988,283,611.57/86,800.71
  6. Step 6: Final answer
    x = 45,947.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.