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Finding the Fourth Proportional to 339,439.89, 509,159.82 and 86,720.91

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Solution

The fourth proportional to 339,439.89, 509,159.82 and 86,720.91 is: 130,081.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,439.89 : 509,159.82 = 86,720.91 : x
  2. Step 2: Convert to fraction form
    339,439.89/509,159.82 = 86,720.91/x
  3. Step 3: Cross multiply
    339,439.89x = 509,159.82 × 86,720.91
  4. Step 4: Simplify right side
    339,439.89x = 44,154,802,925.84
  5. Step 5: Solve for x
    x = 44,154,802,925.84/339,439.89
  6. Step 6: Final answer
    x = 130,081.36

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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.