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Finding the Fourth Proportional to 128,308.31, 192,450.10 and 39,537.98

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Solution

The fourth proportional to 128,308.31, 192,450.10 and 39,537.98 is: 59,303.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,308.31 : 192,450.10 = 39,537.98 : x
  2. Step 2: Convert to fraction form
    128,308.31/192,450.10 = 39,537.98/x
  3. Step 3: Cross multiply
    128,308.31x = 192,450.10 × 39,537.98
  4. Step 4: Simplify right side
    128,308.31x = 7,609,088,204.80
  5. Step 5: Solve for x
    x = 7,609,088,204.80/128,308.31
  6. Step 6: Final answer
    x = 59,303.16

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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.