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Finding the Fourth Proportional to 141,787.51, 195,665.51 and 78,124.84

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Solution

The fourth proportional to 141,787.51, 195,665.51 and 78,124.84 is: 107,811.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,787.51 : 195,665.51 = 78,124.84 : x
  2. Step 2: Convert to fraction form
    141,787.51/195,665.51 = 78,124.84/x
  3. Step 3: Cross multiply
    141,787.51x = 195,665.51 × 78,124.84
  4. Step 4: Simplify right side
    141,787.51x = 15,286,336,368.42
  5. Step 5: Solve for x
    x = 15,286,336,368.42/141,787.51
  6. Step 6: Final answer
    x = 107,811.59

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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.