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Finding the Fourth Proportional to 128,412.64, 192,628.23 and 39,654.66

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Solution

The fourth proportional to 128,412.64, 192,628.23 and 39,654.66 is: 59,484.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,412.64 : 192,628.23 = 39,654.66 : x
  2. Step 2: Convert to fraction form
    128,412.64/192,628.23 = 39,654.66/x
  3. Step 3: Cross multiply
    128,412.64x = 192,628.23 × 39,654.66
  4. Step 4: Simplify right side
    128,412.64x = 7,638,607,540.70
  5. Step 5: Solve for x
    x = 7,638,607,540.70/128,412.64
  6. Step 6: Final answer
    x = 59,484.86

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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.