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Finding the Fourth Proportional to 128,062.50, 192,109.08 and 39,304.40

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Solution

The fourth proportional to 128,062.50, 192,109.08 and 39,304.40 is: 58,961.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,062.50 : 192,109.08 = 39,304.40 : x
  2. Step 2: Convert to fraction form
    128,062.50/192,109.08 = 39,304.40/x
  3. Step 3: Cross multiply
    128,062.50x = 192,109.08 × 39,304.40
  4. Step 4: Simplify right side
    128,062.50x = 7,550,731,163.41
  5. Step 5: Solve for x
    x = 7,550,731,163.41/128,062.50
  6. Step 6: Final answer
    x = 58,961.30

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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.