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Finding the Fourth Proportional to 339,971.72, 509,975.80 and 87,254.42

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Solution

The fourth proportional to 339,971.72, 509,975.80 and 87,254.42 is: 130,886.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,971.72 : 509,975.80 = 87,254.42 : x
  2. Step 2: Convert to fraction form
    339,971.72/509,975.80 = 87,254.42/x
  3. Step 3: Cross multiply
    339,971.72x = 509,975.80 × 87,254.42
  4. Step 4: Simplify right side
    339,971.72x = 44,497,639,875.02
  5. Step 5: Solve for x
    x = 44,497,639,875.02/339,971.72
  6. Step 6: Final answer
    x = 130,886.30

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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.