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Finding the Fourth Proportional to 86,371.43, 129,264.52 and 53,112.56

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Solution

The fourth proportional to 86,371.43, 129,264.52 and 53,112.56 is: 79,488.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,371.43 : 129,264.52 = 53,112.56 : x
  2. Step 2: Convert to fraction form
    86,371.43/129,264.52 = 53,112.56/x
  3. Step 3: Cross multiply
    86,371.43x = 129,264.52 × 53,112.56
  4. Step 4: Simplify right side
    86,371.43x = 6,865,569,574.37
  5. Step 5: Solve for x
    x = 6,865,569,574.37/86,371.43
  6. Step 6: Final answer
    x = 79,488.90

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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.