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Finding the Fourth Proportional to 128,493.60, 192,671.28 and 39,708.96

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Solution

The fourth proportional to 128,493.60, 192,671.28 and 39,708.96 is: 59,542.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,493.60 : 192,671.28 = 39,708.96 : x
  2. Step 2: Convert to fraction form
    128,493.60/192,671.28 = 39,708.96/x
  3. Step 3: Cross multiply
    128,493.60x = 192,671.28 × 39,708.96
  4. Step 4: Simplify right side
    128,493.60x = 7,650,776,150.67
  5. Step 5: Solve for x
    x = 7,650,776,150.67/128,493.60
  6. Step 6: Final answer
    x = 59,542.08

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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.