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Finding the Fourth Proportional to 291,702.30, 437,553.45 and 81,339.90

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Solution

The fourth proportional to 291,702.30, 437,553.45 and 81,339.90 is: 122,009.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,702.30 : 437,553.45 = 81,339.90 : x
  2. Step 2: Convert to fraction form
    291,702.30/437,553.45 = 81,339.90/x
  3. Step 3: Cross multiply
    291,702.30x = 437,553.45 × 81,339.90
  4. Step 4: Simplify right side
    291,702.30x = 35,590,553,867.66
  5. Step 5: Solve for x
    x = 35,590,553,867.66/291,702.30
  6. Step 6: Final answer
    x = 122,009.85

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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.