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Finding the Fourth Proportional to 128,622.56, 192,941.13 and 39,888.68

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Solution

The fourth proportional to 128,622.56, 192,941.13 and 39,888.68 is: 59,835.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,622.56 : 192,941.13 = 39,888.68 : x
  2. Step 2: Convert to fraction form
    128,622.56/192,941.13 = 39,888.68/x
  3. Step 3: Cross multiply
    128,622.56x = 192,941.13 × 39,888.68
  4. Step 4: Simplify right side
    128,622.56x = 7,696,166,793.97
  5. Step 5: Solve for x
    x = 7,696,166,793.97/128,622.56
  6. Step 6: Final answer
    x = 59,835.28

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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.