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Finding the Fourth Proportional to 113,858.60, 170,787.90 and 91,715.23

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Solution

The fourth proportional to 113,858.60, 170,787.90 and 91,715.23 is: 137,572.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,858.60 : 170,787.90 = 91,715.23 : x
  2. Step 2: Convert to fraction form
    113,858.60/170,787.90 = 91,715.23/x
  3. Step 3: Cross multiply
    113,858.60x = 170,787.90 × 91,715.23
  4. Step 4: Simplify right side
    113,858.60x = 15,663,851,529.72
  5. Step 5: Solve for x
    x = 15,663,851,529.72/113,858.60
  6. Step 6: Final answer
    x = 137,572.85

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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.