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Finding the Fourth Proportional to 128,534.70, 192,744.45 and 49,622.70

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Solution

The fourth proportional to 128,534.70, 192,744.45 and 49,622.70 is: 74,411.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,534.70 : 192,744.45 = 49,622.70 : x
  2. Step 2: Convert to fraction form
    128,534.70/192,744.45 = 49,622.70/x
  3. Step 3: Cross multiply
    128,534.70x = 192,744.45 × 49,622.70
  4. Step 4: Simplify right side
    128,534.70x = 9,564,500,019.02
  5. Step 5: Solve for x
    x = 9,564,500,019.02/128,534.70
  6. Step 6: Final answer
    x = 74,411.81

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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.