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Finding the Fourth Proportional to 239,459.09, 359,112.08 and 81,710.78

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Solution

The fourth proportional to 239,459.09, 359,112.08 and 81,710.78 is: 122,540.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,459.09 : 359,112.08 = 81,710.78 : x
  2. Step 2: Convert to fraction form
    239,459.09/359,112.08 = 81,710.78/x
  3. Step 3: Cross multiply
    239,459.09x = 359,112.08 × 81,710.78
  4. Step 4: Simplify right side
    239,459.09x = 29,343,326,572.94
  5. Step 5: Solve for x
    x = 29,343,326,572.94/239,459.09
  6. Step 6: Final answer
    x = 122,540.04

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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.