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Finding the Fourth Proportional to 278,702.60, 418,029.60 and 91,714.10

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Solution

The fourth proportional to 278,702.60, 418,029.60 and 91,714.10 is: 137,563.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,702.60 : 418,029.60 = 91,714.10 : x
  2. Step 2: Convert to fraction form
    278,702.60/418,029.60 = 91,714.10/x
  3. Step 3: Cross multiply
    278,702.60x = 418,029.60 × 91,714.10
  4. Step 4: Simplify right side
    278,702.60x = 38,339,208,537.36
  5. Step 5: Solve for x
    x = 38,339,208,537.36/278,702.60
  6. Step 6: Final answer
    x = 137,563.15

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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.