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Finding the Fourth Proportional to 49,659.60, 68,518.80 and 30,787.68

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Solution

The fourth proportional to 49,659.60, 68,518.80 and 30,787.68 is: 42,479.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,659.60 : 68,518.80 = 30,787.68 : x
  2. Step 2: Convert to fraction form
    49,659.60/68,518.80 = 30,787.68/x
  3. Step 3: Cross multiply
    49,659.60x = 68,518.80 × 30,787.68
  4. Step 4: Simplify right side
    49,659.60x = 2,109,534,888.38
  5. Step 5: Solve for x
    x = 2,109,534,888.38/49,659.60
  6. Step 6: Final answer
    x = 42,479.90

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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.