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Finding the Fourth Proportional to 76,168.96, 105,159.36 and 49,719.04

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Solution

The fourth proportional to 76,168.96, 105,159.36 and 49,719.04 is: 68,642.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,168.96 : 105,159.36 = 49,719.04 : x
  2. Step 2: Convert to fraction form
    76,168.96/105,159.36 = 49,719.04/x
  3. Step 3: Cross multiply
    76,168.96x = 105,159.36 × 49,719.04
  4. Step 4: Simplify right side
    76,168.96x = 5,228,422,426.21
  5. Step 5: Solve for x
    x = 5,228,422,426.21/76,168.96
  6. Step 6: Final answer
    x = 68,642.43

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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.