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Finding the Fourth Proportional to 68,989.60, 95,160.72 and 56,394.40

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Solution

The fourth proportional to 68,989.60, 95,160.72 and 56,394.40 is: 77,787.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,989.60 : 95,160.72 = 56,394.40 : x
  2. Step 2: Convert to fraction form
    68,989.60/95,160.72 = 56,394.40/x
  3. Step 3: Cross multiply
    68,989.60x = 95,160.72 × 56,394.40
  4. Step 4: Simplify right side
    68,989.60x = 5,366,531,707.97
  5. Step 5: Solve for x
    x = 5,366,531,707.97/68,989.60
  6. Step 6: Final answer
    x = 77,787.55

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1.5x scale

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.