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Finding the Fourth Proportional to 339,788.98, 509,702.16 and 87,071.58

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Solution

The fourth proportional to 339,788.98, 509,702.16 and 87,071.58 is: 130,612.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,788.98 : 509,702.16 = 87,071.58 : x
  2. Step 2: Convert to fraction form
    339,788.98/509,702.16 = 87,071.58/x
  3. Step 3: Cross multiply
    339,788.98x = 509,702.16 × 87,071.58
  4. Step 4: Simplify right side
    339,788.98x = 44,380,572,400.61
  5. Step 5: Solve for x
    x = 44,380,572,400.61/339,788.98
  6. Step 6: Final answer
    x = 130,612.16

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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.