Home / 77,429.31-116,142.59-21,269.20

Finding the Fourth Proportional to 77,429.31, 116,142.59 and 21,269.20

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Solution

The fourth proportional to 77,429.31, 116,142.59 and 21,269.20 is: 31,903.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,429.31 : 116,142.59 = 21,269.20 : x
  2. Step 2: Convert to fraction form
    77,429.31/116,142.59 = 21,269.20/x
  3. Step 3: Cross multiply
    77,429.31x = 116,142.59 × 21,269.20
  4. Step 4: Simplify right side
    77,429.31x = 2,470,259,288.17
  5. Step 5: Solve for x
    x = 2,470,259,288.17/77,429.31
  6. Step 6: Final answer
    x = 31,903.42

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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.