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Finding the Fourth Proportional to 128,042.34, 192,060.90 and 39,293.88

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Solution

The fourth proportional to 128,042.34, 192,060.90 and 39,293.88 is: 58,940.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,042.34 : 192,060.90 = 39,293.88 : x
  2. Step 2: Convert to fraction form
    128,042.34/192,060.90 = 39,293.88/x
  3. Step 3: Cross multiply
    128,042.34x = 192,060.90 × 39,293.88
  4. Step 4: Simplify right side
    128,042.34x = 7,546,817,957.29
  5. Step 5: Solve for x
    x = 7,546,817,957.29/128,042.34
  6. Step 6: Final answer
    x = 58,940.02

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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.