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Finding the Fourth Proportional to 139,881.33, 193,035.42 and 76,218.93

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Solution

The fourth proportional to 139,881.33, 193,035.42 and 76,218.93 is: 105,181.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,881.33 : 193,035.42 = 76,218.93 : x
  2. Step 2: Convert to fraction form
    139,881.33/193,035.42 = 76,218.93/x
  3. Step 3: Cross multiply
    139,881.33x = 193,035.42 × 76,218.93
  4. Step 4: Simplify right side
    139,881.33x = 14,712,953,164.50
  5. Step 5: Solve for x
    x = 14,712,953,164.50/139,881.33
  6. Step 6: Final answer
    x = 105,181.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.