Home / 78,411.39-117,617.09-19,246.56

Finding the Fourth Proportional to 78,411.39, 117,617.09 and 19,246.56

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Solution

The fourth proportional to 78,411.39, 117,617.09 and 19,246.56 is: 28,869.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,411.39 : 117,617.09 = 19,246.56 : x
  2. Step 2: Convert to fraction form
    78,411.39/117,617.09 = 19,246.56/x
  3. Step 3: Cross multiply
    78,411.39x = 117,617.09 × 19,246.56
  4. Step 4: Simplify right side
    78,411.39x = 2,263,724,283.48
  5. Step 5: Solve for x
    x = 2,263,724,283.48/78,411.39
  6. Step 6: Final answer
    x = 28,869.84

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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.