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Finding the Fourth Proportional to 128,599.68, 192,929.40 and 39,848.52

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Solution

The fourth proportional to 128,599.68, 192,929.40 and 39,848.52 is: 59,782.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,599.68 : 192,929.40 = 39,848.52 : x
  2. Step 2: Convert to fraction form
    128,599.68/192,929.40 = 39,848.52/x
  3. Step 3: Cross multiply
    128,599.68x = 192,929.40 × 39,848.52
  4. Step 4: Simplify right side
    128,599.68x = 7,687,951,054.49
  5. Step 5: Solve for x
    x = 7,687,951,054.49/128,599.68
  6. Step 6: Final answer
    x = 59,782.04

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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.