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Finding the Fourth Proportional to 128,673.76, 193,011.72 and 49,797.04

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Solution

The fourth proportional to 128,673.76, 193,011.72 and 49,797.04 is: 74,695.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,673.76 : 193,011.72 = 49,797.04 : x
  2. Step 2: Convert to fraction form
    128,673.76/193,011.72 = 49,797.04/x
  3. Step 3: Cross multiply
    128,673.76x = 193,011.72 × 49,797.04
  4. Step 4: Simplify right side
    128,673.76x = 9,611,412,341.31
  5. Step 5: Solve for x
    x = 9,611,412,341.31/128,673.76
  6. Step 6: Final answer
    x = 74,695.98

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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.