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Finding the Fourth Proportional to 86,371.77, 119,129.59 and 57,247.46

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Solution

The fourth proportional to 86,371.77, 119,129.59 and 57,247.46 is: 78,959.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,371.77 : 119,129.59 = 57,247.46 : x
  2. Step 2: Convert to fraction form
    86,371.77/119,129.59 = 57,247.46/x
  3. Step 3: Cross multiply
    86,371.77x = 119,129.59 × 57,247.46
  4. Step 4: Simplify right side
    86,371.77x = 6,819,866,879.28
  5. Step 5: Solve for x
    x = 6,819,866,879.28/86,371.77
  6. Step 6: Final answer
    x = 78,959.45

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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.