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Finding the Fourth Proportional to 80,957.64, 121,477.78 and 54,607.12

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Solution

The fourth proportional to 80,957.64, 121,477.78 and 54,607.12 is: 81,938.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,957.64 : 121,477.78 = 54,607.12 : x
  2. Step 2: Convert to fraction form
    80,957.64/121,477.78 = 54,607.12/x
  3. Step 3: Cross multiply
    80,957.64x = 121,477.78 × 54,607.12
  4. Step 4: Simplify right side
    80,957.64x = 6,633,551,709.79
  5. Step 5: Solve for x
    x = 6,633,551,709.79/80,957.64
  6. Step 6: Final answer
    x = 81,938.55

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1.5x scale

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.