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Finding the Fourth Proportional to 118,787.87, 163,851.74 and 77,954.64

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Solution

The fourth proportional to 118,787.87, 163,851.74 and 77,954.64 is: 107,527.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,787.87 : 163,851.74 = 77,954.64 : x
  2. Step 2: Convert to fraction form
    118,787.87/163,851.74 = 77,954.64/x
  3. Step 3: Cross multiply
    118,787.87x = 163,851.74 × 77,954.64
  4. Step 4: Simplify right side
    118,787.87x = 12,773,003,405.07
  5. Step 5: Solve for x
    x = 12,773,003,405.07/118,787.87
  6. Step 6: Final answer
    x = 107,527.84

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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.